22220012 has 12 divisors (see below), whose sum is σ = 38990280. Its totient is φ = 11079936.

The previous prime is 22219999. The next prime is 22220027. The reversal of 22220012 is 21002222.

It is a junction number, because it is equal to n+sod(n) for n = 22219975 and 22220002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5813 + ... + 8844.

It is an arithmetic number, because the mean of its divisors is an integer number (3249190).

Almost surely, 2^22220012 is an apocalyptic number.

It is an amenable number.

22220012 is a deficient number, since it is larger than the sum of its proper divisors (16770268).

22220012 is a wasteful number, since it uses less digits than its factorization.

22220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15040 (or 15038 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22220012 is about 4713.8107726127. The cubic root of 22220012 is about 281.1349005901.

Adding to 22220012 its reverse (21002222), we get a palindrome (43222234).

The spelling of 22220012 in words is "twenty-two million, two hundred twenty thousand, twelve".