131022230431221 has 6 divisors (see below), whose sum is σ = 189254332845110. Its totient is φ = 87348153620808.

The previous prime is 131022230431201. The next prime is 131022230431297. The reversal of 131022230431221 is 122134032220131.

131022230431221 is a `hidden beast` number, since 1 + 3 + 1 + 0 + 2 + 2 + 2 + 3 + 0 + 431 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 108815149102500 + 22207081328721 = 10431450^2 + 4712439^2 .

It is not a de Polignac number, because 131022230431221 - 2⁹ = 131022230430709 is a prime.

It is a super-2 number, since 2×131022230431221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022230431201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7279012801726 + ... + 7279012801743.

Almost surely, 2^{131022230431221} is an apocalyptic number.

It is an amenable number.

131022230431221 is a deficient number, since it is larger than the sum of its proper divisors (58232102413889).

131022230431221 is a wasteful number, since it uses less digits than its factorization.

131022230431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14558025603475 (or 14558025603472 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 131022230431221 its reverse (122134032220131), we get a palindrome (253156262651352).

The spelling of 131022230431221 in words is "one hundred thirty-one trillion, twenty-two billion, two hundred thirty million, four hundred thirty-one thousand, two hundred twenty-one".