123230311312 has 10 divisors (see below), whose sum is σ = 238758728198. Its totient is φ = 61615155648.

The previous prime is 123230311307. The next prime is 123230311333. The reversal of 123230311312 is 213113032321.

It can be written as a sum of positive squares in only one way, i.e., 103776756736 + 19453554576 = 322144^2 + 139476^2 .

It is a super-2 number, since 2×123230311312² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3850947213 + ... + 3850947244.

Almost surely, 2^123230311312 is an apocalyptic number.

It is an amenable number.

123230311312 is a deficient number, since it is larger than the sum of its proper divisors (115528416886).

123230311312 is an equidigital number, since it uses as much as digits as its factorization.

123230311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701894465 (or 7701894459 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123230311312 its reverse (213113032321), we get a palindrome (336343343633).

The spelling of 123230311312 in words is "one hundred twenty-three billion, two hundred thirty million, three hundred eleven thousand, three hundred twelve".