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121023213 = 383486037
BaseRepresentation
bin1110011011010…
…10101011101101
322102201121122020
413031222223231
5221440220323
620001540353
72666452233
oct715525355
9272647566
10121023213
1162350593
12346446b9
131c0c488c
1412104953
15a958ae3
hex736aaed

121023213 has 8 divisors (see below), whose sum is σ = 163308768. Its totient is φ = 79709904.

The previous prime is 121023209. The next prime is 121023257. The reversal of 121023213 is 312320121.

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

It is not a de Polignac number, because 121023213 - 22 = 121023209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121023192 and 121023201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121023283) 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 7 ways as a sum of consecutive naturals, for example, 242770 + ... + 243267.

It is an arithmetic number, because the mean of its divisors is an integer number (20413596).

Almost surely, 2121023213 is an apocalyptic number.

It is an amenable number.

121023213 is a deficient number, since it is larger than the sum of its proper divisors (42285555).

121023213 is an equidigital number, since it uses as much as digits as its factorization.

121023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486123.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121023213 is about 11001.0550857634. The cubic root of 121023213 is about 494.6403713735.

Adding to 121023213 its reverse (312320121), we get a palindrome (433343334).

The spelling of 121023213 in words is "one hundred twenty-one million, twenty-three thousand, two hundred thirteen".

Divisors: 1 3 83 249 486037 1458111 40341071 121023213