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234211220021 = 4173181432337
BaseRepresentation
bin1101101000100000010…
…0111001101000110101
3211101112120201201201102
43122020010321220311
512314131033020041
6255332315135445
722630654344152
oct3321004715065
9741476651642
10234211220021
1190368145159
1239484a44585
1319116cbac2c
14b49b943229
15615bb4709b
hex3688139a35

234211220021 has 16 divisors (see below), whose sum is σ = 244554583728. Its totient is φ = 224122982400.

The previous prime is 234211219997. The next prime is 234211220027. The reversal of 234211220021 is 120022112432.

It can be written as a sum of positive squares in 8 ways, for example, as 110842384900 + 123368835121 = 332930^2 + 351239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-234211220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 234211219975 and 234211220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234211220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325565 + ... + 757901.

It is an arithmetic number, because the mean of its divisors is an integer number (15284661483).

Almost surely, 2234211220021 is an apocalyptic number.

It is an amenable number.

234211220021 is a deficient number, since it is larger than the sum of its proper divisors (10343363707).

234211220021 is a wasteful number, since it uses less digits than its factorization.

234211220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432632.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 234211220021 its reverse (120022112432), we get a palindrome (354233332453).

The spelling of 234211220021 in words is "two hundred thirty-four billion, two hundred eleven million, two hundred twenty thousand, twenty-one".

Divisors: 1 41 73 181 2993 7421 13213 432337 541733 17725817 31560601 78252997 1293984641 3208372877 5712468781 234211220021