22212021222012 has 24 divisors (see below), whose sum is σ = 51829768286800. Its totient is φ = 7403761535616.

The previous prime is 22212021221983. The next prime is 22212021222043. The reversal of 22212021222012 is 21022212021222.

It is a super-2 number, since 2×22212021222012² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22212021222012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30315187 + ... + 31039242.

Almost surely, 2^{22212021222012} is an apocalyptic number.

It is an amenable number.

22212021222012 is an abundant number, since it is smaller than the sum of its proper divisors (29617747064788).

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

22212021222012 is a wasteful number, since it uses less digits than its factorization.

22212021222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61384605 (or 61384603 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22212021222012 its reverse (21022212021222), we get a palindrome (43234233243234).

The spelling of 22212021222012 in words is "twenty-two trillion, two hundred twelve billion, twenty-one million, two hundred twenty-two thousand, twelve".