22121112 has 32 divisors (see below), whose sum is σ = 59557680. Its totient is φ = 6806400.

The previous prime is 22121089. The next prime is 22121137. The reversal of 22121112 is 21112122.

It is a super-2 number, since 2×22121112² = 978687192233088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35139 + ... + 35762.

Almost surely, 2^22121112 is an apocalyptic number.

It is an amenable number.

22121112 is an abundant number, since it is smaller than the sum of its proper divisors (37436568).

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

22121112 is a wasteful number, since it uses less digits than its factorization.

22121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70923 (or 70919 counting only the distinct ones).

The product of its digits is 16, while the sum is 12.

The square root of 22121112 is about 4703.3086226613. The cubic root of 22121112 is about 280.7171751081.

Adding to 22121112 its reverse (21112122), we get a palindrome (43233234).

The spelling of 22121112 in words is "twenty-two million, one hundred twenty-one thousand, one hundred twelve".