21031431000134 has 32 divisors (see below), whose sum is σ = 32282199271296. Its totient is φ = 10271598100480.

The previous prime is 21031431000101. The next prime is 21031431000157. The reversal of 21031431000134 is 43100013413012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145561712 + ... + 145706124.

It is an arithmetic number, because the mean of its divisors is an integer number (1008818727228).

Almost surely, 2^{21031431000134} is an apocalyptic number.

21031431000134 is a deficient number, since it is larger than the sum of its proper divisors (11250768271162).

21031431000134 is a wasteful number, since it uses less digits than its factorization.

21031431000134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147520.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21031431000134 its reverse (43100013413012), we get a palindrome (64131444413146).

The spelling of 21031431000134 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, one hundred thirty-four", and thus it is an aban number.