22212122011212 has 96 divisors (see below), whose sum is σ = 59770909965312. Its totient is φ = 6288870998016.

The previous prime is 22212122011207. The next prime is 22212122011229. The reversal of 22212122011212 is 21211022121222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1500913 + ... + 6832055.

It is an arithmetic number, because the mean of its divisors is an integer number (622613645472).

Almost surely, 2^{22212122011212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22212122011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29885454982656).

22212122011212 is an abundant number, since it is smaller than the sum of its proper divisors (37558787954100).

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

22212122011212 is a wasteful number, since it uses less digits than its factorization.

22212122011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331607 (or 5331605 counting only the distinct ones).

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

Adding to 22212122011212 its reverse (21211022121222), we get a palindrome (43423144132434).

The spelling of 22212122011212 in words is "twenty-two trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, two hundred twelve".