123112222131 has 8 divisors (see below), whose sum is σ = 169809961680. Its totient is φ = 79244648672.

The previous prime is 123112222111. The next prime is 123112222139. The reversal of 123112222131 is 131222211321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123112222131 - 2⁵ = 123112222099 is a prime.

It is a super-2 number, since 2×123112222131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123112222098 and 123112222107.

It is not an unprimeable number, because it can be changed into a prime (123112222139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707541420 + ... + 707541593.

It is an arithmetic number, because the mean of its divisors is an integer number (21226245210).

Almost surely, 2^123112222131 is an apocalyptic number.

123112222131 is a deficient number, since it is larger than the sum of its proper divisors (46697739549).

123112222131 is a wasteful number, since it uses less digits than its factorization.

123112222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415083045.

The product of its digits is 288, while the sum is 21.

Adding to 123112222131 its reverse (131222211321), we get a palindrome (254334433452).

The spelling of 123112222131 in words is "one hundred twenty-three billion, one hundred twelve million, two hundred twenty-two thousand, one hundred thirty-one".