39222031921 has 2 divisors, whose sum is σ = 39222031922. Its totient is φ = 39222031920.

The previous prime is 39222031909. The next prime is 39222031999. The reversal of 39222031921 is 12913022293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28640823696 + 10581208225 = 169236^2 + 102865^2 .

It is a cyclic number.

It is not a de Polignac number, because 39222031921 - 2⁵ = 39222031889 is a prime.

It is not a weakly prime, because it can be changed into another prime (39222031421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19611015960 + 19611015961.

It is an arithmetic number, because the mean of its divisors is an integer number (19611015961).

Almost surely, 2^39222031921 is an apocalyptic number.

It is an amenable number.

39222031921 is a deficient number, since it is larger than the sum of its proper divisors (1).

39222031921 is an equidigital number, since it uses as much as digits as its factorization.

39222031921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 39222031921 in words is "thirty-nine billion, two hundred twenty-two million, thirty-one thousand, nine hundred twenty-one".