12312120100112 has 40 divisors (see below), whose sum is σ = 27278283500736. Its totient is φ = 5273578025856.

The previous prime is 12312120100073. The next prime is 12312120100117. The reversal of 12312120100112 is 21100102121321.

It is a happy number.

It is a super-3 number, since 3×12312120100112³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12312120100117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31522478 + ... + 31910669.

Almost surely, 2^{12312120100112} is an apocalyptic number.

It is an amenable number.

12312120100112 is an abundant number, since it is smaller than the sum of its proper divisors (14966163400624).

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

12312120100112 is a wasteful number, since it uses less digits than its factorization.

12312120100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63434895 (or 63434889 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12312120100112 its reverse (21100102121321), we get a palindrome (33412222221433).

The spelling of 12312120100112 in words is "twelve trillion, three hundred twelve billion, one hundred twenty million, one hundred thousand, one hundred twelve".