221020102111100 has 18 divisors (see below), whose sum is σ = 479613621581304. Its totient is φ = 88408040844400.

The previous prime is 221020102111063. The next prime is 221020102111139. The reversal of 221020102111100 is 1111201020122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105100510456 + ... + 1105100510655.

Almost surely, 2^{221020102111100} is an apocalyptic number.

221020102111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020102111100 is an abundant number, since it is smaller than the sum of its proper divisors (258593519470204).

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

221020102111100 is a wasteful number, since it uses less digits than its factorization.

221020102111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210201021125 (or 2210201021118 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221020102111100 its reverse (1111201020122), we get a palindrome (222131303131222).

The spelling of 221020102111100 in words is "two hundred twenty-one trillion, twenty billion, one hundred two million, one hundred eleven thousand, one hundred".