222121121222 has 64 divisors (see below), whose sum is σ = 451778439168. Its totient is φ = 79092720000.

The previous prime is 222121121197. The next prime is 222121121227.

222121121222 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 222121121194 and 222121121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121121227) 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 31 ways as a sum of consecutive naturals, for example, 347054 + ... + 751457.

It is an arithmetic number, because the mean of its divisors is an integer number (7059038112).

Almost surely, 2^222121121222 is an apocalyptic number.

222121121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

222121121222 is an abundant number, since it is smaller than the sum of its proper divisors (229657317946).

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

222121121222 is a wasteful number, since it uses less digits than its factorization.

222121121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098645.

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

It can be divided in two parts, 222121 and 121222, that added together give a palindrome (343343).

The spelling of 222121121222 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".