221204022 has 32 divisors (see below), whose sum is σ = 478867200. Its totient is φ = 67716000.

The previous prime is 221203993. The next prime is 221204063. The reversal of 221204022 is 220402122.

It is a junction number, because it is equal to n+sod(n) for n = 221203992 and 221204010.

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, 8397 + ... + 22647.

It is an arithmetic number, because the mean of its divisors is an integer number (14964600).

Almost surely, 2^221204022 is an apocalyptic number.

221204022 is an abundant number, since it is smaller than the sum of its proper divisors (257663178).

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

221204022 is a wasteful number, since it uses less digits than its factorization.

221204022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14468.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 221204022 is about 14872.9291667781. The cubic root of 221204022 is about 604.7803514742.

Adding to 221204022 its reverse (220402122), we get a palindrome (441606144).

The spelling of 221204022 in words is "two hundred twenty-one million, two hundred four thousand, twenty-two".