221221100110 has 16 divisors (see below), whose sum is σ = 403238462400. Its totient is φ = 87368332896.

The previous prime is 221221100041. The next prime is 221221100141. The reversal of 221221100110 is 11001122122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140012565 + ... + 140014144.

It is an arithmetic number, because the mean of its divisors is an integer number (25202403900).

Almost surely, 2^221221100110 is an apocalyptic number.

221221100110 is a deficient number, since it is larger than the sum of its proper divisors (182017362290).

221221100110 is a wasteful number, since it uses less digits than its factorization.

221221100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280026795.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221221100110 its reverse (11001122122), we get a palindrome (232222222232).

The spelling of 221221100110 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, one hundred ten".