22022121 has 48 divisors (see below), whose sum is σ = 35409920. Its totient is φ = 12117600.

The previous prime is 22022113. The next prime is 22022131. The reversal of 22022121 is 12122022.

It is not a de Polignac number, because 22022121 - 2³ = 22022113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22022097 and 22022106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022101) 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 47 ways as a sum of consecutive naturals, for example, 213756 + ... + 213858.

Almost surely, 2^22022121 is an apocalyptic number.

It is an amenable number.

22022121 is a deficient number, since it is larger than the sum of its proper divisors (13387799).

22022121 is a wasteful number, since it uses less digits than its factorization.

22022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22022121 is about 4692.7732738755. The cubic root of 22022121 is about 280.2978166242.

Adding to 22022121 its reverse (12122022), we get a palindrome (34144143).

Subtracting from 22022121 its reverse (12122022), we obtain a palindrome (9900099).

It can be divided in two parts, 22022 and 121, that multiplied together give a palindrome (2664662).

The spelling of 22022121 in words is "twenty-two million, twenty-two thousand, one hundred twenty-one".