12111972 has 24 divisors (see below), whose sum is σ = 28528416. Its totient is φ = 3999168.

The previous prime is 12111929. The next prime is 12111989. The reversal of 12111972 is 27911121.

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, 3433 + ... + 6000.

It is an arithmetic number, because the mean of its divisors is an integer number (1188684).

Almost surely, 2^12111972 is an apocalyptic number.

12111972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111972 is an abundant number, since it is smaller than the sum of its proper divisors (16416444).

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

12111972 is a wasteful number, since it uses less digits than its factorization.

12111972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547 (or 9545 counting only the distinct ones).

The product of its digits is 252, while the sum is 24.

The square root of 12111972 is about 3480.2258547399. The cubic root of 12111972 is about 229.6527336615.

The spelling of 12111972 in words is "twelve million, one hundred eleven thousand, nine hundred seventy-two".