221222102211220 has 48 divisors (see below), whose sum is σ = 506801206550016. Its totient is φ = 80444165648000.

The previous prime is 221222102211193. The next prime is 221222102211223. The reversal of 221222102211220 is 22112201222122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221222102211191 and 221222102211200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222102211223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85678710 + ... + 88222930.

It is an arithmetic number, because the mean of its divisors is an integer number (10558358469792).

Almost surely, 2^{221222102211220} is an apocalyptic number.

221222102211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222102211220 is an abundant number, since it is smaller than the sum of its proper divisors (285579104338796).

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

221222102211220 is a wasteful number, since it uses less digits than its factorization.

221222102211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939472 (or 2939470 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221222102211220 its reverse (22112201222122), we get a palindrome (243334303433342).

The spelling of 221222102211220 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred two million, two hundred eleven thousand, two hundred twenty".