22212120211212 has 72 divisors (see below), whose sum is σ = 53764729107264. Its totient is φ = 7136603857728.

The previous prime is 22212120211201. The next prime is 22212120211241. The reversal of 22212120211212 is 21211202121222.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4560378 + ... + 8075969.

It is an arithmetic number, because the mean of its divisors is an integer number (746732348712).

Almost surely, 2^{22212120211212} is an apocalyptic number.

It is an amenable number.

22212120211212 is an abundant number, since it is smaller than the sum of its proper divisors (31552608896052).

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

22212120211212 is a wasteful number, since it uses less digits than its factorization.

22212120211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12636535 (or 12636496 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22212120211212 its reverse (21211202121222), we get a palindrome (43423322332434).

The spelling of 22212120211212 in words is "twenty-two trillion, two hundred twelve billion, one hundred twenty million, two hundred eleven thousand, two hundred twelve".