100121232331 has 4 divisors (see below), whose sum is σ = 100699967952. Its totient is φ = 99542496712.

The previous prime is 100121232319. The next prime is 100121232359. The reversal of 100121232331 is 133232121001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100121232331 - 2²⁹ = 99584361419 is a prime.

It is a super-2 number, since 2×100121232331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121232299 and 100121232308.

It is not an unprimeable number, because it can be changed into a prime (100121232371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289367551 + ... + 289367896.

It is an arithmetic number, because the mean of its divisors is an integer number (25174991988).

Almost surely, 2^100121232331 is an apocalyptic number.

100121232331 is a deficient number, since it is larger than the sum of its proper divisors (578735621).

100121232331 is an equidigital number, since it uses as much as digits as its factorization.

100121232331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578735620.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 100121232331 its reverse (133232121001), we get a palindrome (233353353332).

The spelling of 100121232331 in words is "one hundred billion, one hundred twenty-one million, two hundred thirty-two thousand, three hundred thirty-one".