131221304313020 has 48 divisors (see below), whose sum is σ = 284456144044800. Its totient is φ = 50794947202560.

The previous prime is 131221304312981. The next prime is 131221304313079. The reversal of 131221304313020 is 20313403122131.

It is a happy number.

It is a super-2 number, since 2×131221304313020² (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 15 ways as a sum of consecutive naturals, for example, 86049746 + ... + 87561414.

It is an arithmetic number, because the mean of its divisors is an integer number (5926169667600).

Almost surely, 2^{131221304313020} is an apocalyptic number.

131221304313020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131221304313020 is an abundant number, since it is smaller than the sum of its proper divisors (153234839731780).

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

131221304313020 is a wasteful number, since it uses less digits than its factorization.

131221304313020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651718 (or 1651716 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 131221304313020 its reverse (20313403122131), we get a palindrome (151534707435151).

The spelling of 131221304313020 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred four million, three hundred thirteen thousand, twenty".