21031431000329 has 2 divisors, whose sum is σ = 21031431000330. Its totient is φ = 21031431000328.

The previous prime is 21031431000259. The next prime is 21031431000347. The reversal of 21031431000329 is 92300013413012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14467981542400 + 6563449457929 = 3803680^2 + 2561923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031431000329 is a prime.

It is not a weakly prime, because it can be changed into another prime (21031431600329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515715500164 + 10515715500165.

It is an arithmetic number, because the mean of its divisors is an integer number (10515715500165).

Almost surely, 2^{21031431000329} is an apocalyptic number.

It is an amenable number.

21031431000329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031431000329 is an equidigital number, since it uses as much as digits as its factorization.

21031431000329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21031431000329 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, three hundred twenty-nine", and thus it is an aban number.