2021101577923 has 2 divisors, whose sum is σ = 2021101577924. Its totient is φ = 2021101577922.

The previous prime is 2021101577909. The next prime is 2021101577941. The reversal of 2021101577923 is 3297751011202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021101577923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021101577953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010550788961 + 1010550788962.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550788962).

Almost surely, 2^{2021101577923} is an apocalyptic number.

2021101577923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021101577923 is an equidigital number, since it uses as much as digits as its factorization.

2021101577923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 2021101577923 in words is "two trillion, twenty-one billion, one hundred one million, five hundred seventy-seven thousand, nine hundred twenty-three".