131020121100 has 72 divisors (see below), whose sum is σ = 413547156288. Its totient is φ = 31762452800.

The previous prime is 131020121081. The next prime is 131020121147. The reversal of 131020121100 is 1121020131.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 19848234 + ... + 19854833.

It is an arithmetic number, because the mean of its divisors is an integer number (5743710504).

Almost surely, 2^131020121100 is an apocalyptic number.

131020121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131020121100 is an abundant number, since it is smaller than the sum of its proper divisors (282527035188).

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

131020121100 is a wasteful number, since it uses less digits than its factorization.

131020121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39703095 (or 39703088 counting only the distinct ones).

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

Adding to 131020121100 its reverse (1121020131), we get a palindrome (132141141231).

The spelling of 131020121100 in words is "one hundred thirty-one billion, twenty million, one hundred twenty-one thousand, one hundred".