131222332423421 has 4 divisors (see below), whose sum is σ = 131363583589500. Its totient is φ = 131081081257344.

The previous prime is 131222332423327. The next prime is 131222332423423. The reversal of 131222332423421 is 124324233222131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1219898160100 + 130002434263321 = 1104490^2 + 11401861^2 .

It is a cyclic number.

It is not a de Polignac number, because 131222332423421 - 2²² = 131222328229117 is a prime.

It is a super-3 number, since 3×131222332423421³ (a number of 43 digits) contains 333 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 (131222332423423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70625581646 + ... + 70625583503.

It is an arithmetic number, because the mean of its divisors is an integer number (32840895897375).

Almost surely, 2^{131222332423421} is an apocalyptic number.

It is an amenable number.

131222332423421 is a deficient number, since it is larger than the sum of its proper divisors (141251166079).

131222332423421 is an equidigital number, since it uses as much as digits as its factorization.

131222332423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141251166078.

The product of its digits is 82944, while the sum is 35.

Adding to 131222332423421 its reverse (124324233222131), we get a palindrome (255546565645552).

The spelling of 131222332423421 in words is "one hundred thirty-one trillion, two hundred twenty-two billion, three hundred thirty-two million, four hundred twenty-three thousand, four hundred twenty-one".