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202121101 = 7132221111
BaseRepresentation
bin11000000110000…
…01111110001101
3112002022211000201
430003001332031
5403220333401
632020053501
75003000230
oct1403017615
9462284021
10202121101
11a4101636
1257834291
1332b4a8b0
141cbb5417
1512b27b01
hexc0c1f8d

202121101 has 8 divisors (see below), whose sum is σ = 248764544. Its totient is φ = 159919920.

The previous prime is 202121081. The next prime is 202121137. The reversal of 202121101 is 101121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202121101 - 213 = 202112909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110465 + ... + 1110646.

It is an arithmetic number, because the mean of its divisors is an integer number (31095568).

Almost surely, 2202121101 is an apocalyptic number.

It is an amenable number.

202121101 is a deficient number, since it is larger than the sum of its proper divisors (46643443).

202121101 is a wasteful number, since it uses less digits than its factorization.

202121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221131.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 202121101 is about 14216.9300835307. The cubic root of 202121101 is about 586.8636608521.

Adding to 202121101 its reverse (101121202), we get a palindrome (303242303).

The spelling of 202121101 in words is "two hundred two million, one hundred twenty-one thousand, one hundred one".

Divisors: 1 7 13 91 2221111 15547777 28874443 202121101