21322231807 has 2 divisors, whose sum is σ = 21322231808. Its totient is φ = 21322231806.

The previous prime is 21322231739. The next prime is 21322231849. The reversal of 21322231807 is 70813222312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21322231807 - 2²⁷ = 21188014079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322231867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661115903 + 10661115904.

It is an arithmetic number, because the mean of its divisors is an integer number (10661115904).

Almost surely, 2^21322231807 is an apocalyptic number.

21322231807 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322231807 is an equidigital number, since it uses as much as digits as its factorization.

21322231807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 21322231807 in words is "twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, eight hundred seven".