31230012113 has 2 divisors, whose sum is σ = 31230012114. Its totient is φ = 31230012112.

The previous prime is 31230012049. The next prime is 31230012127. The reversal of 31230012113 is 31121003213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21454339729 + 9775672384 = 146473^2 + 98872^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230012113 - 2⁶ = 31230012049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31230012091 and 31230012100.

It is not a weakly prime, because it can be changed into another prime (31230012013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615006056 + 15615006057.

It is an arithmetic number, because the mean of its divisors is an integer number (15615006057).

Almost surely, 2^31230012113 is an apocalyptic number.

It is an amenable number.

31230012113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230012113 is an equidigital number, since it uses as much as digits as its factorization.

31230012113 is an odious number, because the sum of its binary digits is odd.

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

Adding to 31230012113 its reverse (31121003213), we get a palindrome (62351015326).

The spelling of 31230012113 in words is "thirty-one billion, two hundred thirty million, twelve thousand, one hundred thirteen".