22113212 has 24 divisors (see below), whose sum is σ = 44053632. Its totient is φ = 9614000.

The previous prime is 22113191. The next prime is 22113229. The reversal of 22113212 is 21231122.

It is a happy number.

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, 9914 + ... + 11937.

It is an arithmetic number, because the mean of its divisors is an integer number (1835568).

Almost surely, 2^22113212 is an apocalyptic number.

22113212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22113212 is a deficient number, since it is larger than the sum of its proper divisors (21940420).

22113212 is a wasteful number, since it uses less digits than its factorization.

22113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21889 (or 21887 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 22113212 is about 4702.4687133462. The cubic root of 22113212 is about 280.6837540978.

Adding to 22113212 its reverse (21231122), we get a palindrome (43344334).

The spelling of 22113212 in words is "twenty-two million, one hundred thirteen thousand, two hundred twelve".