103131113081 has 2 divisors, whose sum is σ = 103131113082. Its totient is φ = 103131113080.

The previous prime is 103131113009. The next prime is 103131113087. The reversal of 103131113081 is 180311131301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86306688400 + 16824424681 = 293780^2 + 129709^2 .

It is a cyclic number.

It is not a de Polignac number, because 103131113081 - 2³⁴ = 85951243897 is a prime.

It is a super-2 number, since 2×103131113081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (103131113087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51565556540 + 51565556541.

It is an arithmetic number, because the mean of its divisors is an integer number (51565556541).

Almost surely, 2^103131113081 is an apocalyptic number.

It is an amenable number.

103131113081 is a deficient number, since it is larger than the sum of its proper divisors (1).

103131113081 is an equidigital number, since it uses as much as digits as its factorization.

103131113081 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 23.

Adding to 103131113081 its reverse (180311131301), we get a palindrome (283442244382).

The spelling of 103131113081 in words is "one hundred three billion, one hundred thirty-one million, one hundred thirteen thousand, eighty-one".