102001022199977 has 2 divisors, whose sum is σ = 102001022199978. Its totient is φ = 102001022199976.

The previous prime is 102001022199943. The next prime is 102001022200039. The reversal of 102001022199977 is 779991220100201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73009915733056 + 28991106466921 = 8544584^2 + 5384339^2 .

It is a cyclic number.

It is not a de Polignac number, because 102001022199977 - 2¹⁰ = 102001022198953 is a prime.

It is not a weakly prime, because it can be changed into another prime (102001022199277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000511099988 + 51000511099989.

It is an arithmetic number, because the mean of its divisors is an integer number (51000511099989).

Almost surely, 2^{102001022199977} is an apocalyptic number.

It is an amenable number.

102001022199977 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001022199977 is an equidigital number, since it uses as much as digits as its factorization.

102001022199977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 50.

The spelling of 102001022199977 in words is "one hundred two trillion, one billion, twenty-two million, one hundred ninety-nine thousand, nine hundred seventy-seven".