2106121 has 4 divisors (see below), whose sum is σ = 2110672. Its totient is φ = 2101572.

The previous prime is 2106107. The next prime is 2106149. The reversal of 2106121 is 1216012.

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 2106121 - 2⁵ = 2106089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106191) 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, 1491 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (527668).

2^2106121 is an apocalyptic number.

It is an amenable number.

2106121 is a deficient number, since it is larger than the sum of its proper divisors (4551).

2106121 is an equidigital number, since it uses as much as digits as its factorization.

2106121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2106121 is about 1451.2480835474. The cubic root of 2106121 is about 128.1822152553.

The spelling of 2106121 in words is "two million, one hundred six thousand, one hundred twenty-one".