221221200022 has 16 divisors (see below), whose sum is σ = 351465227280. Its totient is φ = 104070343168.

The previous prime is 221221200001. The next prime is 221221200037. The reversal of 221221200022 is 220002122122.

It is a junction number, because it is equal to n+sod(n) for n = 221221199969 and 221221200005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948148 + ... + 1158199.

It is an arithmetic number, because the mean of its divisors is an integer number (21966576705).

Almost surely, 2^221221200022 is an apocalyptic number.

221221200022 is a deficient number, since it is larger than the sum of its proper divisors (130244027258).

221221200022 is a wasteful number, since it uses less digits than its factorization.

221221200022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109455.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221221200022 its reverse (220002122122), we get a palindrome (441223322144).

The spelling of 221221200022 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, twenty-two".