2022121 has 4 divisors (see below), whose sum is σ = 2042244. Its totient is φ = 2002000.

The previous prime is 2022103. The next prime is 2022149. The reversal of 2022121 is 1212202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1022121 + 1000000 = 1011^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022121 - 2⁹ = 2021609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2022098 and 2022107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022101) 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, 9910 + ... + 10111.

It is an arithmetic number, because the mean of its divisors is an integer number (510561).

2^2022121 is an apocalyptic number.

It is an amenable number.

2022121 is a deficient number, since it is larger than the sum of its proper divisors (20123).

2022121 is a wasteful number, since it uses less digits than its factorization.

2022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20122.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2022121 is about 1422.0130097858. The cubic root of 2022121 is about 126.4549147503.

Adding to 2022121 its reverse (1212202), we get a palindrome (3234323).

The spelling of 2022121 in words is "two million, twenty-two thousand, one hundred twenty-one".