202131121999 has 2 divisors, whose sum is σ = 202131122000. Its totient is φ = 202131121998.

The previous prime is 202131121993. The next prime is 202131122003. The reversal of 202131121999 is 999121131202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202131121999 - 2²⁹ = 201594251087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202131121993) 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, 101065560999 + 101065561000.

It is an arithmetic number, because the mean of its divisors is an integer number (101065561000).

Almost surely, 2^202131121999 is an apocalyptic number.

202131121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131121999 is an equidigital number, since it uses as much as digits as its factorization.

202131121999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 202131121999 in words is "two hundred two billion, one hundred thirty-one million, one hundred twenty-one thousand, nine hundred ninety-nine".