202101890999 has 2 divisors, whose sum is σ = 202101891000. Its totient is φ = 202101890998.

The previous prime is 202101890981. The next prime is 202101891091. The reversal of 202101890999 is 999098101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202101890999 - 2²⁰ = 202100842423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202101890929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050945499 + 101050945500.

It is an arithmetic number, because the mean of its divisors is an integer number (101050945500).

Almost surely, 2^202101890999 is an apocalyptic number.

202101890999 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101890999 is an equidigital number, since it uses as much as digits as its factorization.

202101890999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 50.

The spelling of 202101890999 in words is "two hundred two billion, one hundred one million, eight hundred ninety thousand, nine hundred ninety-nine".