221104020 has 48 divisors (see below), whose sum is σ = 628342848. Its totient is φ = 58080000.

The previous prime is 221104019. The next prime is 221104043. The reversal of 221104020 is 20401122.

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

It is a junction number, because it is equal to n+sod(n) for n = 221103987 and 221104005.

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, 23481 + ... + 31520.

It is an arithmetic number, because the mean of its divisors is an integer number (13090476).

Almost surely, 2^221104020 is an apocalyptic number.

221104020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221104020 is an abundant number, since it is smaller than the sum of its proper divisors (407238828).

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

221104020 is a wasteful number, since it uses less digits than its factorization.

221104020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55080 (or 55078 counting only the distinct ones).

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

The square root of 221104020 is about 14869.5669069412. The cubic root of 221104020 is about 604.6892012919.

Adding to 221104020 its reverse (20401122), we get a palindrome (241505142).

The spelling of 221104020 in words is "two hundred twenty-one million, one hundred four thousand, twenty".