12121122112112 has 60 divisors (see below), whose sum is σ = 25432166605464. Its totient is φ = 5593920433920.

The previous prime is 12121122112103. The next prime is 12121122112123. The reversal of 12121122112112 is 21121122112121.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35232287 + ... + 35574657.

Almost surely, 2^{12121122112112} is an apocalyptic number.

It is an amenable number.

12121122112112 is an abundant number, since it is smaller than the sum of its proper divisors (13311044493352).

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

12121122112112 is a wasteful number, since it uses less digits than its factorization.

12121122112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355498 (or 355479 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 12121122112112 its reverse (21121122112121), we get a palindrome (33242244224233).

Subtracting 12121122112112 from its reverse (21121122112121), we obtain a palindrome (9000000000009).

The spelling of 12121122112112 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred twelve".