131233421220020 has 96 divisors (see below), whose sum is σ = 315062861863680. Its totient is φ = 44979654435840.

The previous prime is 131233421219977. The next prime is 131233421220067. The reversal of 131233421220020 is 20022124332131.

It is a super-2 number, since 2×131233421220020² (a number of 29 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 31 ways as a sum of consecutive naturals, for example, 8396781566 + ... + 8396797194.

It is an arithmetic number, because the mean of its divisors is an integer number (3281904811080).

Almost surely, 2^{131233421220020} is an apocalyptic number.

131233421220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131233421220020 is an abundant number, since it is smaller than the sum of its proper divisors (183829440643660).

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

131233421220020 is a wasteful number, since it uses less digits than its factorization.

131233421220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31353 (or 31351 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 131233421220020 its reverse (20022124332131), we get a palindrome (151255545552151).

The spelling of 131233421220020 in words is "one hundred thirty-one trillion, two hundred thirty-three billion, four hundred twenty-one million, two hundred twenty thousand, twenty".