2192121 has 12 divisors (see below), whose sum is σ = 3179748. Its totient is φ = 1455264.

The previous prime is 2192111. The next prime is 2192123. The reversal of 2192121 is 1212912.

It can be written as a sum of positive squares in 2 ways, for example, as 837225 + 1354896 = 915^2 + 1164^2 .

It is not a de Polignac number, because 2192121 - 2⁵ = 2192089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2192094 and 2192103.

It is not an unprimeable number, because it can be changed into a prime (2192123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3031 + ... + 3683.

It is an arithmetic number, because the mean of its divisors is an integer number (264979).

2^2192121 is an apocalyptic number.

It is an amenable number.

2192121 is a deficient number, since it is larger than the sum of its proper divisors (987627).

2192121 is a wasteful number, since it uses less digits than its factorization.

2192121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1029 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 2192121 is about 1480.5813047584. The cubic root of 2192121 is about 129.9036959339.

The spelling of 2192121 in words is "two million, one hundred ninety-two thousand, one hundred twenty-one".