222221121234 has 64 divisors (see below), whose sum is σ = 535608115200. Its totient is φ = 60044243328.

The previous prime is 222221121233. The next prime is 222221121257. The reversal of 222221121234 is 432121122222.

It is a super-2 number, since 2×222221121234² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (222221121233) 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, 209359 + ... + 698765.

It is an arithmetic number, because the mean of its divisors is an integer number (8368876800).

Almost surely, 2^222221121234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222221121234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267804057600).

222221121234 is an abundant number, since it is smaller than the sum of its proper divisors (313386993966).

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

222221121234 is a wasteful number, since it uses less digits than its factorization.

222221121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490007.

The product of its digits is 1536, while the sum is 24.

Adding to 222221121234 its reverse (432121122222), we get a palindrome (654342243456).

The spelling of 222221121234 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-four".