123212130112 has 14 divisors (see below), whose sum is σ = 244499070818. Its totient is φ = 61606065024.

The previous prime is 123212130037. The next prime is 123212130163. The reversal of 123212130112 is 211031212321.

It can be written as a sum of positive squares in only one way, i.e., 77426401536 + 45785728576 = 278256^2 + 213976^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123212130112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962594703 + ... + 962594830.

Almost surely, 2^123212130112 is an apocalyptic number.

It is an amenable number.

123212130112 is a deficient number, since it is larger than the sum of its proper divisors (121286940706).

123212130112 is an equidigital number, since it uses as much as digits as its factorization.

123212130112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925189545 (or 1925189535 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123212130112 its reverse (211031212321), we get a palindrome (334243342433).

The spelling of 123212130112 in words is "one hundred twenty-three billion, two hundred twelve million, one hundred thirty thousand, one hundred twelve".