131405137421 has 16 divisors (see below), whose sum is σ = 134211470400. Its totient is φ = 128618851200.

The previous prime is 131405137417. The next prime is 131405137429. The reversal of 131405137421 is 124731504131.

It is a cyclic number.

It is not a de Polignac number, because 131405137421 - 2² = 131405137417 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 (131405137429) 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, 30851390 + ... + 30855648.

It is an arithmetic number, because the mean of its divisors is an integer number (8388216900).

Almost surely, 2^131405137421 is an apocalyptic number.

It is an amenable number.

131405137421 is a deficient number, since it is larger than the sum of its proper divisors (2806332979).

131405137421 is a wasteful number, since it uses less digits than its factorization.

131405137421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 131405137421 in words is "one hundred thirty-one billion, four hundred five million, one hundred thirty-seven thousand, four hundred twenty-one".