123311440312 has 32 divisors (see below), whose sum is σ = 246177176400. Its totient is φ = 57704717824.

The previous prime is 123311440309. The next prime is 123311440337. The reversal of 123311440312 is 213044113321.

It is a super-2 number, since 2×123311440312² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508343 + ... + 2557030.

Almost surely, 2^123311440312 is an apocalyptic number.

It is an amenable number.

123311440312 is a deficient number, since it is larger than the sum of its proper divisors (122865736088).

123311440312 is a wasteful number, since it uses less digits than its factorization.

123311440312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065575 (or 5065571 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 123311440312 its reverse (213044113321), we get a palindrome (336355553633).

The spelling of 123311440312 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred forty thousand, three hundred twelve".