107166491021 has 2 divisors, whose sum is σ = 107166491022. Its totient is φ = 107166491020.

The previous prime is 107166490919. The next prime is 107166491023. The reversal of 107166491021 is 120194661701.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86174538025 + 20991952996 = 293555^2 + 144886^2 .

It is a cyclic number.

It is not a de Polignac number, because 107166491021 - 2¹⁴ = 107166474637 is a prime.

It is a super-2 number, since 2×107166491021² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 107166491023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107166491023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53583245510 + 53583245511.

It is an arithmetic number, because the mean of its divisors is an integer number (53583245511).

Almost surely, 2^107166491021 is an apocalyptic number.

It is an amenable number.

107166491021 is a deficient number, since it is larger than the sum of its proper divisors (1).

107166491021 is an equidigital number, since it uses as much as digits as its factorization.

107166491021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 107166491021 in words is "one hundred seven billion, one hundred sixty-six million, four hundred ninety-one thousand, twenty-one".