222221100024 has 256 divisors, whose sum is σ = 777074688000. Its totient is φ = 57158939520.

The previous prime is 222221100001. The next prime is 222221100029. The reversal of 222221100024 is 420001122222.

It is a super-2 number, since 2×222221100024² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221100029) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1648237 + ... + 1777955.

It is an arithmetic number, because the mean of its divisors is an integer number (3035448000).

Almost surely, 2^222221100024 is an apocalyptic number.

222221100024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222221100024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388537344000).

222221100024 is an abundant number, since it is smaller than the sum of its proper divisors (554853587976).

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

222221100024 is a wasteful number, since it uses less digits than its factorization.

222221100024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129855 (or 129845 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222221100024 its reverse (420001122222), we get a palindrome (642222222246).

The spelling of 222221100024 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, twenty-four".