2112981 has 16 divisors (see below), whose sum is σ = 3213504. Its totient is φ = 1223424.

The previous prime is 2112973. The next prime is 2112989. The reversal of 2112981 is 1892112.

2112981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2112973) and next prime (2112989).

It is not a de Polignac number, because 2112981 - 2³ = 2112973 is a prime.

It is a super-2 number, since 2×2112981² = 8929377412722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (200844).

2^2112981 is an apocalyptic number.

It is an amenable number.

2112981 is a deficient number, since it is larger than the sum of its proper divisors (1100523).

2112981 is a wasteful number, since it uses less digits than its factorization.

2112981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220.

The product of its digits is 288, while the sum is 24.

The square root of 2112981 is about 1453.6096449873. The cubic root of 2112981 is about 128.3212349683.

The spelling of 2112981 in words is "two million, one hundred twelve thousand, nine hundred eighty-one".