203112031013 has 2 divisors, whose sum is σ = 203112031014. Its totient is φ = 203112031012.

The previous prime is 203112031009. The next prime is 203112031021. The reversal of 203112031013 is 310130211302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130134790564 + 72977240449 = 360742^2 + 270143^2 .

It is a cyclic number.

It is not a de Polignac number, because 203112031013 - 2² = 203112031009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203112030982 and 203112031000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203112031063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556015506 + 101556015507.

It is an arithmetic number, because the mean of its divisors is an integer number (101556015507).

Almost surely, 2^203112031013 is an apocalyptic number.

It is an amenable number.

203112031013 is a deficient number, since it is larger than the sum of its proper divisors (1).

203112031013 is an equidigital number, since it uses as much as digits as its factorization.

203112031013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 203112031013 its reverse (310130211302), we get a palindrome (513242242315).

The spelling of 203112031013 in words is "two hundred three billion, one hundred twelve million, thirty-one thousand, thirteen".