21031431000133 has 16 divisors (see below), whose sum is σ = 21107738995200. Its totient is φ = 20955236046336.

The previous prime is 21031431000101. The next prime is 21031431000157. The reversal of 21031431000133 is 33100013413012.

It is a cyclic number.

It is not a de Polignac number, because 21031431000133 - 2⁵ = 21031431000101 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 (21031431000193) 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, 2820357141 + ... + 2820364597.

It is an arithmetic number, because the mean of its divisors is an integer number (1319233687200).

Almost surely, 2^{21031431000133} is an apocalyptic number.

It is an amenable number.

21031431000133 is a deficient number, since it is larger than the sum of its proper divisors (76307995067).

21031431000133 is a wasteful number, since it uses less digits than its factorization.

21031431000133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21031431000133 its reverse (33100013413012), we get a palindrome (54131444413145).

The spelling of 21031431000133 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, one hundred thirty-three", and thus it is an aban number.