123112331113 has 4 divisors (see below), whose sum is σ = 127357583940. Its totient is φ = 118867078288.

The previous prime is 123112331107. The next prime is 123112331119. The reversal of 123112331113 is 311133211321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123112331107) and next prime (123112331119).

It can be written as a sum of positive squares in 2 ways, for example, as 33323407209 + 89788923904 = 182547^2 + 299648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123112331113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123112331119) 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 in 3 ways as a sum of consecutive naturals, for example, 2122626370 + ... + 2122626427.

It is an arithmetic number, because the mean of its divisors is an integer number (31839395985).

Almost surely, 2^123112331113 is an apocalyptic number.

It is an amenable number.

123112331113 is a deficient number, since it is larger than the sum of its proper divisors (4245252827).

123112331113 is an equidigital number, since it uses as much as digits as its factorization.

123112331113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245252826.

The product of its digits is 324, while the sum is 22.

Adding to 123112331113 its reverse (311133211321), we get a palindrome (434245542434).

The spelling of 123112331113 in words is "one hundred twenty-three billion, one hundred twelve million, three hundred thirty-one thousand, one hundred thirteen".