100222222221220 has 96 divisors (see below), whose sum is σ = 235211322528000. Its totient is φ = 35553843916800.

The previous prime is 100222222221169. The next prime is 100222222221229. The reversal of 100222222221220 is 22122222222001.

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 = 100222222221191 and 100222222221200.

It is not an unprimeable number, because it can be changed into a prime (100222222221229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195017361 + ... + 195530599.

It is an arithmetic number, because the mean of its divisors is an integer number (2450117943000).

Almost surely, 2^{100222222221220} is an apocalyptic number.

100222222221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100222222221220 is an abundant number, since it is smaller than the sum of its proper divisors (134989100306780).

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

100222222221220 is a wasteful number, since it uses less digits than its factorization.

100222222221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534949 (or 534947 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 100222222221220 its reverse (22122222222001), we get a palindrome (122344444443221).

It can be divided in two parts, 1002 and 22222221220, that added together give a palindrome (22222222222).

The spelling of 100222222221220 in words is "one hundred trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".