202131122251 has 2 divisors, whose sum is σ = 202131122252. Its totient is φ = 202131122250.

The previous prime is 202131122101. The next prime is 202131122287. The reversal of 202131122251 is 152221131202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202131122251 - 2³³ = 193541187659 is a prime.

It is not a weakly prime, because it can be changed into another prime (202131192251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065561125 + 101065561126.

It is an arithmetic number, because the mean of its divisors is an integer number (101065561126).

Almost surely, 2^202131122251 is an apocalyptic number.

202131122251 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131122251 is an equidigital number, since it uses as much as digits as its factorization.

202131122251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 202131122251 its reverse (152221131202), we get a palindrome (354352253453).

The spelling of 202131122251 in words is "two hundred two billion, one hundred thirty-one million, one hundred twenty-two thousand, two hundred fifty-one".