221101221110 has 128 divisors (see below), whose sum is σ = 530388891648. Its totient is φ = 64310400000.

The previous prime is 221101221083. The next prime is 221101221127. The reversal of 221101221110 is 11122101122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 573860 + ... + 878360.

It is an arithmetic number, because the mean of its divisors is an integer number (4143663216).

Almost surely, 2^221101221110 is an apocalyptic number.

221101221110 is an abundant number, since it is smaller than the sum of its proper divisors (309287670538).

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

221101221110 is a wasteful number, since it uses less digits than its factorization.

221101221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304590.

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

Adding to 221101221110 its reverse (11122101122), we get a palindrome (232223322232).

The spelling of 221101221110 in words is "two hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, one hundred ten".