221021111011100 has 36 divisors (see below), whose sum is σ = 479624832191904. Its totient is φ = 88406781492480.

The previous prime is 221021111011091. The next prime is 221021111011121. The reversal of 221021111011100 is 1110111120122.

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 11 ways as a sum of consecutive naturals, for example, 15436484 + ... + 26083083.

Almost surely, 2^{221021111011100} is an apocalyptic number.

221021111011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021111011100 is an abundant number, since it is smaller than the sum of its proper divisors (258603721180804).

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

221021111011100 is a wasteful number, since it uses less digits than its factorization.

221021111011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41572814 (or 41572807 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221021111011100 its reverse (1110111120122), we get a palindrome (222131222131222).

The spelling of 221021111011100 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred eleven million, eleven thousand, one hundred".