10221001957 has 2 divisors, whose sum is σ = 10221001958. Its totient is φ = 10221001956.

The previous prime is 10221001907. The next prime is 10221002081. The reversal of 10221001957 is 75910012201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8606087361 + 1614914596 = 92769^2 + 40186^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221001957 - 2⁷ = 10221001829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221001907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110500978 + 5110500979.

It is an arithmetic number, because the mean of its divisors is an integer number (5110500979).

Almost surely, 2^10221001957 is an apocalyptic number.

It is an amenable number.

10221001957 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221001957 is an equidigital number, since it uses as much as digits as its factorization.

10221001957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The spelling of 10221001957 in words is "ten billion, two hundred twenty-one million, one thousand, nine hundred fifty-seven".