203113321013 has 2 divisors, whose sum is σ = 203113321014. Its totient is φ = 203113321012.

The previous prime is 203113320997. The next prime is 203113321027. The reversal of 203113321013 is 310123311302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156430533169 + 46682787844 = 395513^2 + 216062^2 .

It is a cyclic number.

It is not a de Polignac number, because 203113321013 - 2⁴ = 203113320997 is a prime.

It is a super-3 number, since 3×203113321013³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203113321043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556660506 + 101556660507.

It is an arithmetic number, because the mean of its divisors is an integer number (101556660507).

Almost surely, 2^203113321013 is an apocalyptic number.

It is an amenable number.

203113321013 is a deficient number, since it is larger than the sum of its proper divisors (1).

203113321013 is an equidigital number, since it uses as much as digits as its factorization.

203113321013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 203113321013 its reverse (310123311302), we get a palindrome (513236632315).

The spelling of 203113321013 in words is "two hundred three billion, one hundred thirteen million, three hundred twenty-one thousand, thirteen".