221021100221110 has 48 divisors (see below), whose sum is σ = 467036910259920. Its totient is φ = 75083445823680.

The previous prime is 221021100221063. The next prime is 221021100221111. The reversal of 221021100221110 is 11122001120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021100221111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2069045076 + ... + 2069151895.

It is an arithmetic number, because the mean of its divisors is an integer number (9729935630415).

Almost surely, 2^{221021100221110} is an apocalyptic number.

221021100221110 is an abundant number, since it is smaller than the sum of its proper divisors (246015810038810).

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

221021100221110 is a wasteful number, since it uses less digits than its factorization.

221021100221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138197101 (or 4138197094 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221021100221110 its reverse (11122001120122), we get a palindrome (232143101341232).

The spelling of 221021100221110 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred million, two hundred twenty-one thousand, one hundred ten".