221003102100 has 72 divisors (see below), whose sum is σ = 697566165408. Its totient is φ = 53576508800.

The previous prime is 221003102057. The next prime is 221003102129. The reversal of 221003102100 is 1201300122.

It is a super-2 number, since 2×221003102100² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33482019 + ... + 33488618.

It is an arithmetic number, because the mean of its divisors is an integer number (9688418964).

Almost surely, 2^221003102100 is an apocalyptic number.

221003102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221003102100 is an abundant number, since it is smaller than the sum of its proper divisors (476563063308).

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

221003102100 is a wasteful number, since it uses less digits than its factorization.

221003102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66970665 (or 66970658 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 221003102100 its reverse (1201300122), we get a palindrome (222204402222).

The spelling of 221003102100 in words is "two hundred twenty-one billion, three million, one hundred two thousand, one hundred".