100120121231 has 4 divisors (see below), whose sum is σ = 107821669032. Its totient is φ = 92418573432.

The previous prime is 100120121219. The next prime is 100120121239. The reversal of 100120121231 is 132121021001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132121021001 = 59 ⋅2239339339.

It is a cyclic number.

It is not a de Polignac number, because 100120121231 - 2³⁴ = 82940252047 is a prime.

It is a super-2 number, since 2×100120121231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100120121239) 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, 3850773881 + ... + 3850773906.

It is an arithmetic number, because the mean of its divisors is an integer number (26955417258).

Almost surely, 2^100120121231 is an apocalyptic number.

100120121231 is a deficient number, since it is larger than the sum of its proper divisors (7701547801).

100120121231 is an equidigital number, since it uses as much as digits as its factorization.

100120121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701547800.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100120121231 its reverse (132121021001), we get a palindrome (232241142232).

The spelling of 100120121231 in words is "one hundred billion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty-one".