21031431000139 has 8 divisors (see below), whose sum is σ = 24811273438208. Its totient is φ = 17445426635880.

The previous prime is 21031431000101. The next prime is 21031431000157. The reversal of 21031431000139 is 93100013413012.

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

It is a cyclic number.

It is not a de Polignac number, because 21031431000139 - 2¹¹ = 21031430998091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031431000199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48459518217 + ... + 48459518650.

It is an arithmetic number, because the mean of its divisors is an integer number (3101409179776).

Almost surely, 2^{21031431000139} is an apocalyptic number.

21031431000139 is a deficient number, since it is larger than the sum of its proper divisors (3779842438069).

21031431000139 is an equidigital number, since it uses as much as digits as its factorization.

21031431000139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96919036905.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 21031431000139 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, one hundred thirty-nine", and thus it is an aban number.