220021104 has 40 divisors (see below), whose sum is σ = 573713280. Its totient is φ = 72653248.

The previous prime is 220021103. The next prime is 220021163. The reversal of 220021104 is 401120022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 220021104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16284 + ... + 26555.

It is an arithmetic number, because the mean of its divisors is an integer number (14342832).

Almost surely, 2^220021104 is an apocalyptic number.

220021104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220021104 is an abundant number, since it is smaller than the sum of its proper divisors (353692176).

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

220021104 is a wasteful number, since it uses less digits than its factorization.

220021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42957 (or 42951 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 220021104 is about 14833.1083728260. The cubic root of 220021104 is about 603.7003762222.

Adding to 220021104 its reverse (401120022), we get a palindrome (621141126).

The spelling of 220021104 in words is "two hundred twenty million, twenty-one thousand, one hundred four".