203113122131 has 2 divisors, whose sum is σ = 203113122132. Its totient is φ = 203113122130.

The previous prime is 203113122103. The next prime is 203113122143. The reversal of 203113122131 is 131221311302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203113122131 is a prime.

It is a super-2 number, since 2×203113122131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203113122181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556561065 + 101556561066.

It is an arithmetic number, because the mean of its divisors is an integer number (101556561066).

Almost surely, 2^203113122131 is an apocalyptic number.

203113122131 is a deficient number, since it is larger than the sum of its proper divisors (1).

203113122131 is an equidigital number, since it uses as much as digits as its factorization.

203113122131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 203113122131 its reverse (131221311302), we get a palindrome (334334433433).

The spelling of 203113122131 in words is "two hundred three billion, one hundred thirteen million, one hundred twenty-two thousand, one hundred thirty-one".