100031232121 has 8 divisors (see below), whose sum is σ = 101145844800. Its totient is φ = 98922795120.

The previous prime is 100031232107. The next prime is 100031232137. The reversal of 100031232121 is 121232130001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100031232121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100031232095 and 100031232104.

It is not an unprimeable number, because it can be changed into a prime (100031232101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511341 + ... + 1576138.

It is an arithmetic number, because the mean of its divisors is an integer number (12643230600).

Almost surely, 2^100031232121 is an apocalyptic number.

It is an amenable number.

100031232121 is a deficient number, since it is larger than the sum of its proper divisors (1114612679).

100031232121 is a wasteful number, since it uses less digits than its factorization.

100031232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087839.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100031232121 its reverse (121232130001), we get a palindrome (221263362122).

The spelling of 100031232121 in words is "one hundred billion, thirty-one million, two hundred thirty-two thousand, one hundred twenty-one".