2111021 has 4 divisors (see below), whose sum is σ = 2302944. Its totient is φ = 1919100.

The previous prime is 2110981. The next prime is 2111023. The reversal of 2111021 is 1201112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2111021 - 2¹⁴ = 2094637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95945 + ... + 95966.

It is an arithmetic number, because the mean of its divisors is an integer number (575736).

2^2111021 is an apocalyptic number.

It is an amenable number.

2111021 is a deficient number, since it is larger than the sum of its proper divisors (191923).

2111021 is a wasteful number, since it uses less digits than its factorization.

2111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191922.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2111021 is about 1452.9353048226. The cubic root of 2111021 is about 128.2815457918.

Adding to 2111021 its reverse (1201112), we get a palindrome (3312133).

Subtracting from 2111021 its reverse (1201112), we obtain a palindrome (909909).

The spelling of 2111021 in words is "two million, one hundred eleven thousand, twenty-one".