221123022222 has 32 divisors (see below), whose sum is σ = 444323027232. Its totient is φ = 73362226304.

The previous prime is 221123022199. The next prime is 221123022247. The reversal of 221123022222 is 222220321122.

It is a super-2 number, since 2×221123022222² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152988 + ... + 1331024.

It is an arithmetic number, because the mean of its divisors is an integer number (13885094601).

Almost surely, 2^221123022222 is an apocalyptic number.

221123022222 is an abundant number, since it is smaller than the sum of its proper divisors (223200005010).

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

221123022222 is a wasteful number, since it uses less digits than its factorization.

221123022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179012.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221123022222 its reverse (222220321122), we get a palindrome (443343343344).

The spelling of 221123022222 in words is "two hundred twenty-one billion, one hundred twenty-three million, twenty-two thousand, two hundred twenty-two".