131221011021202 has 16 divisors (see below), whose sum is σ = 198138343910400. Its totient is φ = 65176238786400.

The previous prime is 131221011021193. The next prime is 131221011021271. The reversal of 131221011021202 is 202120110122131.

It is a self number, because there is not a number n which added to its sum of digits gives 131221011021202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335404674 + ... + 335795677.

It is an arithmetic number, because the mean of its divisors is an integer number (12383646494400).

Almost surely, 2^{131221011021202} is an apocalyptic number.

131221011021202 is a deficient number, since it is larger than the sum of its proper divisors (66917332889198).

131221011021202 is a wasteful number, since it uses less digits than its factorization.

131221011021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671201001.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 131221011021202 its reverse (202120110122131), we get a palindrome (333341121143333).

The spelling of 131221011021202 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, eleven million, twenty-one thousand, two hundred two".