221220022104 has 40 divisors (see below), whose sum is σ = 619620897060. Its totient is φ = 73740007152.

The previous prime is 221220022099. The next prime is 221220022141. The reversal of 221220022104 is 401220022122.

221220022104 is a `hidden beast` number, since 221 + 220 + 0 + 221 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 170693814 + ... + 170695109.

Almost surely, 2^221220022104 is an apocalyptic number.

221220022104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221220022104 is an abundant number, since it is smaller than the sum of its proper divisors (398400874956).

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

221220022104 is a wasteful number, since it uses less digits than its factorization.

221220022104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341388941 (or 341388928 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221220022104 its sum of digits (18), we get a palindrome (221220022122).

Adding to 221220022104 its reverse (401220022122), we get a palindrome (622440044226).

The spelling of 221220022104 in words is "two hundred twenty-one billion, two hundred twenty million, twenty-two thousand, one hundred four".