22012120 has 32 divisors (see below), whose sum is σ = 53338320. Its totient is φ = 8127360.

The previous prime is 22012117. The next prime is 22012129. The reversal of 22012120 is 2121022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22012097 and 22012106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20646 + ... + 21685.

Almost surely, 2^22012120 is an apocalyptic number.

22012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012120 is an abundant number, since it is smaller than the sum of its proper divisors (31326200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22012120 is a wasteful number, since it uses less digits than its factorization.

22012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42355 (or 42351 counting only the distinct ones).

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

The square root of 22012120 is about 4691.7075782704. The cubic root of 22012120 is about 280.2553792506.

Adding to 22012120 its reverse (2121022), we get a palindrome (24133142).

The spelling of 22012120 in words is "twenty-two million, twelve thousand, one hundred twenty".