121231023100 has 72 divisors (see below), whose sum is σ = 287042128128. Its totient is φ = 44075524800.

The previous prime is 121231023091. The next prime is 121231023113. The reversal of 121231023100 is 1320132121.

121231023100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121231023100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10007247 + ... + 10019353.

It is an arithmetic number, because the mean of its divisors is an integer number (3986696224).

Almost surely, 2^121231023100 is an apocalyptic number.

121231023100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231023100 is an abundant number, since it is smaller than the sum of its proper divisors (165811105028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121231023100 is a wasteful number, since it uses less digits than its factorization.

121231023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21235 (or 21228 counting only the distinct ones).

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

Adding to 121231023100 its reverse (1320132121), we get a palindrome (122551155221).

The spelling of 121231023100 in words is "one hundred twenty-one billion, two hundred thirty-one million, twenty-three thousand, one hundred".