22211220011220 has 72 divisors (see below), whose sum is σ = 67375450711296. Its totient is φ = 5922867460032.

The previous prime is 22211220011191. The next prime is 22211220011243. The reversal of 22211220011220 is 2211002211222.

It is a happy number.

22211220011220 is a `hidden beast` number, since 2 + 2 + 211 + 220 + 0 + 11 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22211220011193 and 22211220011202.

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 23 ways as a sum of consecutive naturals, for example, 7450249 + ... + 9996431.

It is an arithmetic number, because the mean of its divisors is an integer number (935770148768).

Almost surely, 2^{22211220011220} is an apocalyptic number.

22211220011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211220011220 is an abundant number, since it is smaller than the sum of its proper divisors (45164230700076).

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

22211220011220 is a wasteful number, since it uses less digits than its factorization.

22211220011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594661 (or 2594656 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22211220011220 its reverse (2211002211222), we get a palindrome (24422222222442).

The spelling of 22211220011220 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty million, eleven thousand, two hundred twenty".