131222331021 has 8 divisors (see below), whose sum is σ = 175533021664. Its totient is φ = 87196597200.

The previous prime is 131222331017. The next prime is 131222331029. The reversal of 131222331021 is 120133222131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131222331021 - 2² = 131222331017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222331029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71238130 + ... + 71239971.

It is an arithmetic number, because the mean of its divisors is an integer number (21941627708).

Almost surely, 2^131222331021 is an apocalyptic number.

It is an amenable number.

131222331021 is a deficient number, since it is larger than the sum of its proper divisors (44310690643).

131222331021 is a wasteful number, since it uses less digits than its factorization.

131222331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142478411.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131222331021 its reverse (120133222131), we get a palindrome (251355553152).

The spelling of 131222331021 in words is "one hundred thirty-one billion, two hundred twenty-two million, three hundred thirty-one thousand, twenty-one".