131321221303212 has 48 divisors (see below), whose sum is σ = 341155831900800. Its totient is φ = 43684588195920.

The previous prime is 131321221303211. The next prime is 131321221303277. The reversal of 131321221303212 is 212303122123131.

131321221303212 is a `hidden beast` number, since 1 + 3 + 1 + 321 + 2 + 2 + 13 + 0 + 321 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131321221303211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1238172262 + ... + 1238278317.

It is an arithmetic number, because the mean of its divisors is an integer number (7107413164600).

Almost surely, 2^{131321221303212} is an apocalyptic number.

131321221303212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131321221303212 is an abundant number, since it is smaller than the sum of its proper divisors (209834610597588).

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

131321221303212 is a wasteful number, since it uses less digits than its factorization.

131321221303212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476451083 (or 2476451075 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 131321221303212 its reverse (212303122123131), we get a palindrome (343624343426343).

The spelling of 131321221303212 in words is "one hundred thirty-one trillion, three hundred twenty-one billion, two hundred twenty-one million, three hundred three thousand, two hundred twelve".