121232131100 has 36 divisors (see below), whose sum is σ = 268037391384. Its totient is φ = 47577890880.

The previous prime is 121232131099. The next prime is 121232131151. The reversal of 121232131100 is 1131232121.

It is a super-2 number, since 2×121232131100² (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 11 ways as a sum of consecutive naturals, for example, 11431694 + ... + 11442293.

It is an arithmetic number, because the mean of its divisors is an integer number (7445483094).

Almost surely, 2^121232131100 is an apocalyptic number.

121232131100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121232131100 is an abundant number, since it is smaller than the sum of its proper divisors (146805260284).

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

121232131100 is a wasteful number, since it uses less digits than its factorization.

121232131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22874054 (or 22874047 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121232131100 its reverse (1131232121), we get a palindrome (122363363221).

It can be divided in two parts, 1212321 and 31100, that added together give a palindrome (1243421).

The spelling of 121232131100 in words is "one hundred twenty-one billion, two hundred thirty-two million, one hundred thirty-one thousand, one hundred".