20022121 has 12 divisors (see below), whose sum is σ = 23924992. Its totient is φ = 16412616.

The previous prime is 20022113. The next prime is 20022127. The reversal of 20022121 is 12122002.

It is not a de Polignac number, because 20022121 - 2³ = 20022113 is a prime.

20022121 is a modest number, since divided by 2121 gives 2002 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20022098 and 20022107.

It is not an unprimeable number, because it can be changed into a prime (20022127) 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 11 ways as a sum of consecutive naturals, for example, 1000 + ... + 6406.

Almost surely, 2^20022121 is an apocalyptic number.

It is an amenable number.

20022121 is a deficient number, since it is larger than the sum of its proper divisors (3902871).

20022121 is an equidigital number, since it uses as much as digits as its factorization.

20022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460 (or 5437 counting only the distinct ones).

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

The square root of 20022121 is about 4474.6084744925. The cubic root of 20022121 is about 271.5418008393.

Adding to 20022121 its reverse (12122002), we get a palindrome (32144123).

The spelling of 20022121 in words is "twenty million, twenty-two thousand, one hundred twenty-one".