131012121100 has 72 divisors (see below), whose sum is σ = 324987914720. Its totient is φ = 44907678720.

The previous prime is 131012121083. The next prime is 131012121127. The reversal of 131012121100 is 1121210131.

It is a happy 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, 3239806 + ... + 3279994.

Almost surely, 2^131012121100 is an apocalyptic number.

131012121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131012121100 is an abundant number, since it is smaller than the sum of its proper divisors (193975793620).

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

131012121100 is a wasteful number, since it uses less digits than its factorization.

131012121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44867 (or 44860 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 131012121100 its reverse (1121210131), we get a palindrome (132133331231).

The spelling of 131012121100 in words is "one hundred thirty-one billion, twelve million, one hundred twenty-one thousand, one hundred".