131220210020100 has 72 divisors (see below), whose sum is σ = 380256107447328. Its totient is φ = 34937466163200.

The previous prime is 131220210020077. The next prime is 131220210020171. The reversal of 131220210020100 is 1020012022131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131220210020100.

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, 340993894 + ... + 341378493.

Almost surely, 2^{131220210020100} is an apocalyptic number.

131220210020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131220210020100 is an abundant number, since it is smaller than the sum of its proper divisors (249035897427228).

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

131220210020100 is a wasteful number, since it uses less digits than its factorization.

131220210020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682373045 (or 682373038 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 131220210020100 its reverse (1020012022131), we get a palindrome (132240222042231).

The spelling of 131220210020100 in words is "one hundred thirty-one trillion, two hundred twenty billion, two hundred ten million, twenty thousand, one hundred".