100431222121 has 4 divisors (see below), whose sum is σ = 101047364752. Its totient is φ = 99815079492.

The previous prime is 100431222113. The next prime is 100431222169. The reversal of 100431222121 is 121222134001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100431222121 - 2³ = 100431222113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100431222421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308071071 + ... + 308071396.

It is an arithmetic number, because the mean of its divisors is an integer number (25261841188).

Almost surely, 2^100431222121 is an apocalyptic number.

It is an amenable number.

100431222121 is a deficient number, since it is larger than the sum of its proper divisors (616142631).

100431222121 is an equidigital number, since it uses as much as digits as its factorization.

100431222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616142630.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 100431222121 its reverse (121222134001), we get a palindrome (221653356122).

The spelling of 100431222121 in words is "one hundred billion, four hundred thirty-one million, two hundred twenty-two thousand, one hundred twenty-one".