31212103110113 has 2 divisors, whose sum is σ = 31212103110114. Its totient is φ = 31212103110112.

The previous prime is 31212103110077. The next prime is 31212103110169. The reversal of 31212103110113 is 31101130121213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29976588607744 + 1235514502369 = 5475088^2 + 1111537^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212103110113 - 2⁴⁴ = 13619917065697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31212103010113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606051555056 + 15606051555057.

It is an arithmetic number, because the mean of its divisors is an integer number (15606051555057).

Almost surely, 2^{31212103110113} is an apocalyptic number.

It is an amenable number.

31212103110113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212103110113 is an equidigital number, since it uses as much as digits as its factorization.

31212103110113 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 20.

Adding to 31212103110113 its reverse (31101130121213), we get a palindrome (62313233231326).

The spelling of 31212103110113 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred ten thousand, one hundred thirteen".