22071212 has 12 divisors (see below), whose sum is σ = 39523176. Its totient is φ = 10778880.

The previous prime is 22071209. The next prime is 22071229. The reversal of 22071212 is 21217022.

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, 63989 + ... + 64332.

It is an arithmetic number, because the mean of its divisors is an integer number (3293598).

Almost surely, 2^22071212 is an apocalyptic number.

It is an amenable number.

22071212 is a deficient number, since it is larger than the sum of its proper divisors (17451964).

22071212 is a wasteful number, since it uses less digits than its factorization.

22071212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128368 (or 128366 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 22071212 is about 4698.0008514261. Note that the first 3 decimals coincide. The cubic root of 22071212 is about 280.5059389971.

Adding to 22071212 its reverse (21217022), we get a palindrome (43288234).

The spelling of 22071212 in words is "twenty-two million, seventy-one thousand, two hundred twelve".