202110023891 has 2 divisors, whose sum is σ = 202110023892. Its totient is φ = 202110023890.

The previous prime is 202110023887. The next prime is 202110023893. The reversal of 202110023891 is 198320011202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202110023891 - 2² = 202110023887 is a prime.

Together with 202110023893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202110023893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055011945 + 101055011946.

It is an arithmetic number, because the mean of its divisors is an integer number (101055011946).

Almost surely, 2^202110023891 is an apocalyptic number.

202110023891 is a deficient number, since it is larger than the sum of its proper divisors (1).

202110023891 is an equidigital number, since it uses as much as digits as its factorization.

202110023891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 202110023891 in words is "two hundred two billion, one hundred ten million, twenty-three thousand, eight hundred ninety-one".