131121311223522 has 32 divisors (see below), whose sum is σ = 277703592048000. Its totient is φ = 41130922381568.

The previous prime is 131121311223499. The next prime is 131121311223541. The reversal of 131121311223522 is 225322113121131.

It is a self number, because there is not a number n which added to its sum of digits gives 131121311223522.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80048622 + ... + 81670217.

It is an arithmetic number, because the mean of its divisors is an integer number (8678237251500).

Almost surely, 2^{131121311223522} is an apocalyptic number.

131121311223522 is an abundant number, since it is smaller than the sum of its proper divisors (146582280824478).

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

131121311223522 is a wasteful number, since it uses less digits than its factorization.

131121311223522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161726810.

The product of its digits is 4320, while the sum is 30.

Adding to 131121311223522 its reverse (225322113121131), we get a palindrome (356443424344653).

The spelling of 131121311223522 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, five hundred twenty-two".