12108981 has 16 divisors (see below), whose sum is σ = 17515008. Its totient is φ = 7411200.

The previous prime is 12108961. The next prime is 12109007. The reversal of 12108981 is 18980121.

12108981 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12108981 - 2⁵ = 12108949 is a prime.

It is a super-2 number, since 2×12108981² = 293254841716722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12108911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (1094688).

Almost surely, 2^12108981 is an apocalyptic number.

It is an amenable number.

12108981 is a deficient number, since it is larger than the sum of its proper divisors (5406027).

12108981 is a wasteful number, since it uses less digits than its factorization.

12108981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 12108981 is about 3479.7961147171. The cubic root of 12108981 is about 229.6338281831.

The spelling of 12108981 in words is "twelve million, one hundred eight thousand, nine hundred eighty-one".