21322304033977 has 2 divisors, whose sum is σ = 21322304033978. Its totient is φ = 21322304033976.

The previous prime is 21322304033969. The next prime is 21322304034037. The reversal of 21322304033977 is 77933040322312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19445886243001 + 1876417790976 = 4409749^2 + 1369824^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322304033977 - 2³ = 21322304033969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21322304033077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661152016988 + 10661152016989.

It is an arithmetic number, because the mean of its divisors is an integer number (10661152016989).

Almost surely, 2^{21322304033977} is an apocalyptic number.

It is an amenable number.

21322304033977 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322304033977 is an equidigital number, since it uses as much as digits as its factorization.

21322304033977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 46.

The spelling of 21322304033977 in words is "twenty-one trillion, three hundred twenty-two billion, three hundred four million, thirty-three thousand, nine hundred seventy-seven".