22212112021220 has 96 divisors (see below), whose sum is σ = 53246965718016. Its totient is φ = 7709502412800.

The previous prime is 22212112021199. The next prime is 22212112021237. The reversal of 22212112021220 is 2212021121222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22212112021192 and 22212112021201.

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 31 ways as a sum of consecutive naturals, for example, 21809729 + ... + 22805448.

It is an arithmetic number, because the mean of its divisors is an integer number (554655892896).

Almost surely, 2^{22212112021220} is an apocalyptic number.

22212112021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212112021220 is an abundant number, since it is smaller than the sum of its proper divisors (31034853696796).

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

22212112021220 is a wasteful number, since it uses less digits than its factorization.

22212112021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44615301 (or 44615299 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22212112021220 its reverse (2212021121222), we get a palindrome (24424133142442).

The spelling of 22212112021220 in words is "twenty-two trillion, two hundred twelve billion, one hundred twelve million, twenty-one thousand, two hundred twenty".