202131020123 has 2 divisors, whose sum is σ = 202131020124. Its totient is φ = 202131020122.

The previous prime is 202131020111. The next prime is 202131020171. The reversal of 202131020123 is 321020131202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202131020123 - 2⁴ = 202131020107 is a prime.

It is not a weakly prime, because it can be changed into another prime (202131023123) 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, 101065510061 + 101065510062.

It is an arithmetic number, because the mean of its divisors is an integer number (101065510062).

Almost surely, 2^202131020123 is an apocalyptic number.

202131020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131020123 is an equidigital number, since it uses as much as digits as its factorization.

202131020123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 202131020123 its reverse (321020131202), we get a palindrome (523151151325).

The spelling of 202131020123 in words is "two hundred two billion, one hundred thirty-one million, twenty thousand, one hundred twenty-three".