21140243312983 has 2 divisors, whose sum is σ = 21140243312984. Its totient is φ = 21140243312982.

The previous prime is 21140243312971. The next prime is 21140243313199. The reversal of 21140243312983 is 38921334204112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21140243312983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140243312953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570121656491 + 10570121656492.

It is an arithmetic number, because the mean of its divisors is an integer number (10570121656492).

Almost surely, 2^{21140243312983} is an apocalyptic number.

21140243312983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140243312983 is an equidigital number, since it uses as much as digits as its factorization.

21140243312983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 21140243312983 in words is "twenty-one trillion, one hundred forty billion, two hundred forty-three million, three hundred twelve thousand, nine hundred eighty-three".