131113332221 has 16 divisors (see below), whose sum is σ = 135871976448. Its totient is φ = 126450105600.

The previous prime is 131113332211. The next prime is 131113332247. The reversal of 131113332221 is 122233311131.

It is a cyclic number.

It is not a de Polignac number, because 131113332221 - 2³⁴ = 113933463037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131113332211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216436 + ... + 1319826.

It is an arithmetic number, because the mean of its divisors is an integer number (8491998528).

Almost surely, 2^131113332221 is an apocalyptic number.

It is an amenable number.

131113332221 is a deficient number, since it is larger than the sum of its proper divisors (4758644227).

131113332221 is a wasteful number, since it uses less digits than its factorization.

131113332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103852.

The product of its digits is 648, while the sum is 23.

Adding to 131113332221 its reverse (122233311131), we get a palindrome (253346643352).

The spelling of 131113332221 in words is "one hundred thirty-one billion, one hundred thirteen million, three hundred thirty-two thousand, two hundred twenty-one".