22220211211220 has 48 divisors (see below), whose sum is σ = 50943975969600. Its totient is φ = 8073808216320.

The previous prime is 22220211211193. The next prime is 22220211211259. The reversal of 22220211211220 is 2211211202222.

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 = 22220211211192 and 22220211211201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38894450 + ... + 39461609.

It is an arithmetic number, because the mean of its divisors is an integer number (1061332832700).

Almost surely, 2^{22220211211220} is an apocalyptic number.

22220211211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220211211220 is an abundant number, since it is smaller than the sum of its proper divisors (28723764758380).

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

22220211211220 is a wasteful number, since it uses less digits than its factorization.

22220211211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78357368 (or 78357366 counting only the distinct ones).

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

Adding to 22220211211220 its reverse (2211211202222), we get a palindrome (24431422413442).

The spelling of 22220211211220 in words is "twenty-two trillion, two hundred twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty".