131320402421 has 8 divisors (see below), whose sum is σ = 144710855520. Its totient is φ = 118399789872.

The previous prime is 131320402397. The next prime is 131320402427. The reversal of 131320402421 is 124204023131.

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

It is a de Polignac number, because none of the positive numbers 2^k-131320402421 is a prime.

It is a super-2 number, since 2×131320402421² (a number of 23 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 (131320402427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117459551 + ... + 117460668.

It is an arithmetic number, because the mean of its divisors is an integer number (18088856940).

Almost surely, 2^131320402421 is an apocalyptic number.

It is an amenable number.

131320402421 is a deficient number, since it is larger than the sum of its proper divisors (13390453099).

131320402421 is a wasteful number, since it uses less digits than its factorization.

131320402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234920275.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 131320402421 its reverse (124204023131), we get a palindrome (255524425552).

The spelling of 131320402421 in words is "one hundred thirty-one billion, three hundred twenty million, four hundred two thousand, four hundred twenty-one".