121231100031 has 8 divisors (see below), whose sum is σ = 161747606400. Its totient is φ = 80767663512.

The previous prime is 121231099981. The next prime is 121231100033. The reversal of 121231100031 is 130001132121.

It is a happy number.

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

It is not a de Polignac number, because 121231100031 - 2⁶ = 121231099967 is a prime.

It is a super-2 number, since 2×121231100031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231100033) 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, 13262131 + ... + 13271268.

It is an arithmetic number, because the mean of its divisors is an integer number (20218450800).

Almost surely, 2^121231100031 is an apocalyptic number.

121231100031 is a deficient number, since it is larger than the sum of its proper divisors (40516506369).

121231100031 is a wasteful number, since it uses less digits than its factorization.

121231100031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26534925.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 121231100031 its reverse (130001132121), we get a palindrome (251232232152).

The spelling of 121231100031 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred thousand, thirty-one".