21131210983 has 2 divisors, whose sum is σ = 21131210984. Its totient is φ = 21131210982.

The previous prime is 21131210941. The next prime is 21131211047. The reversal of 21131210983 is 38901213112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21131210983 - 2¹⁷ = 21131079911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131214983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565605491 + 10565605492.

It is an arithmetic number, because the mean of its divisors is an integer number (10565605492).

Almost surely, 2^21131210983 is an apocalyptic number.

21131210983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131210983 is an equidigital number, since it uses as much as digits as its factorization.

21131210983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21131210983 in words is "twenty-one billion, one hundred thirty-one million, two hundred ten thousand, nine hundred eighty-three".