11312123113 has 2 divisors, whose sum is σ = 11312123114. Its totient is φ = 11312123112.

The previous prime is 11312123111. The next prime is 11312123117. The reversal of 11312123113 is 31132121311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8579761129 + 2732361984 = 92627^2 + 52272^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312123113 - 2¹ = 11312123111 is a prime.

Together with 11312123111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11312123111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656061556 + 5656061557.

It is an arithmetic number, because the mean of its divisors is an integer number (5656061557).

Almost surely, 2^11312123113 is an apocalyptic number.

It is an amenable number.

11312123113 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312123113 is an equidigital number, since it uses as much as digits as its factorization.

11312123113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

Adding to 11312123113 its reverse (31132121311), we get a palindrome (42444244424).

The spelling of 11312123113 in words is "eleven billion, three hundred twelve million, one hundred twenty-three thousand, one hundred thirteen".