221100230100 has 36 divisors (see below), whose sum is σ = 639716666624. Its totient is φ = 58960061280.

The previous prime is 221100230053. The next prime is 221100230119. The reversal of 221100230100 is 1032001122.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368500084 + ... + 368500683.

Almost surely, 2^221100230100 is an apocalyptic number.

221100230100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100230100 is an abundant number, since it is smaller than the sum of its proper divisors (418616436524).

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

221100230100 is a wasteful number, since it uses less digits than its factorization.

221100230100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737000784 (or 737000777 counting only the distinct ones).

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

Adding to 221100230100 its reverse (1032001122), we get a palindrome (222132231222).

The spelling of 221100230100 in words is "two hundred twenty-one billion, one hundred million, two hundred thirty thousand, one hundred".