12121968 has 20 divisors (see below), whose sum is σ = 31315208. Its totient is φ = 4040640.

The previous prime is 12121957. The next prime is 12121973. The reversal of 12121968 is 86912121.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 126223 + ... + 126318.

Almost surely, 2^12121968 is an apocalyptic number.

It is an amenable number.

12121968 is an abundant number, since it is smaller than the sum of its proper divisors (19193240).

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

12121968 is a wasteful number, since it uses less digits than its factorization.

12121968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252552 (or 252546 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 12121968 is about 3481.6616722479. The cubic root of 12121968 is about 229.7158936901.

The spelling of 12121968 in words is "twelve million, one hundred twenty-one thousand, nine hundred sixty-eight".