131221302011020 has 96 divisors (see below), whose sum is σ = 300526120177920. Its totient is φ = 47836426659840.

The previous prime is 131221302010999. The next prime is 131221302011057. The reversal of 131221302011020 is 20110203122131.

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, 1397515194 + ... + 1397609086.

It is an arithmetic number, because the mean of its divisors is an integer number (3130480418520).

Almost surely, 2^{131221302011020} is an apocalyptic number.

131221302011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131221302011020 is an abundant number, since it is smaller than the sum of its proper divisors (169304818166900).

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

131221302011020 is a wasteful number, since it uses less digits than its factorization.

131221302011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162035 (or 162033 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131221302011020 its reverse (20110203122131), we get a palindrome (151331505133151).

The spelling of 131221302011020 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred two million, eleven thousand, twenty".