123303656612 has 12 divisors (see below), whose sum is σ = 223222137180. Its totient is φ = 59525903136.

The previous prime is 123303656599. The next prime is 123303656621. The reversal of 123303656612 is 216656303321.

It can be written as a sum of positive squares in 2 ways, for example, as 42905322496 + 80398334116 = 207136^2 + 283546^2 .

It is a super-2 number, since 2×123303656612² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531481163 + ... + 531481394.

It is an arithmetic number, because the mean of its divisors is an integer number (18601844765).

Almost surely, 2^123303656612 is an apocalyptic number.

It is an amenable number.

123303656612 is a deficient number, since it is larger than the sum of its proper divisors (99918480568).

123303656612 is a wasteful number, since it uses less digits than its factorization.

123303656612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062962590 (or 1062962588 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

Adding to 123303656612 its reverse (216656303321), we get a palindrome (339959959933).

The spelling of 123303656612 in words is "one hundred twenty-three billion, three hundred three million, six hundred fifty-six thousand, six hundred twelve".