123212402112 has 56 divisors (see below), whose sum is σ = 332150441616. Its totient is φ = 40295876608.

The previous prime is 123212402087. The next prime is 123212402147. The reversal of 123212402112 is 211204212321.

It is a happy number.

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, 6043893 + ... + 6064244.

It is an arithmetic number, because the mean of its divisors is an integer number (5931257886).

Almost surely, 2^123212402112 is an apocalyptic number.

123212402112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123212402112 is an abundant number, since it is smaller than the sum of its proper divisors (208938039504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123212402112 is a wasteful number, since it uses less digits than its factorization.

123212402112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12108205 (or 12108195 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 123212402112 its reverse (211204212321), we get a palindrome (334416614433).

The spelling of 123212402112 in words is "one hundred twenty-three billion, two hundred twelve million, four hundred two thousand, one hundred twelve".