131221313200 has 60 divisors (see below), whose sum is σ = 315516903840. Its totient is φ = 52445620480.

The previous prime is 131221313189. The next prime is 131221313287. The reversal of 131221313200 is 2313122131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358137 + ... + 625063.

It is an arithmetic number, because the mean of its divisors is an integer number (5258615064).

Almost surely, 2^131221313200 is an apocalyptic number.

131221313200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131221313200 is an abundant number, since it is smaller than the sum of its proper divisors (184295590640).

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

131221313200 is a wasteful number, since it uses less digits than its factorization.

131221313200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268174 (or 268163 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131221313200 its reverse (2313122131), we get a palindrome (133534435331).

The spelling of 131221313200 in words is "one hundred thirty-one billion, two hundred twenty-one million, three hundred thirteen thousand, two hundred".