221212220110 has 64 divisors (see below), whose sum is σ = 472778467200. Its totient is φ = 72914429952.

The previous prime is 221212220083. The next prime is 221212220137. The reversal of 221212220110 is 11022212122.

It is a happy number.

221212220110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221212220083) and next prime (221212220137).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239146 + ... + 706834.

It is an arithmetic number, because the mean of its divisors is an integer number (7387163550).

Almost surely, 2^221212220110 is an apocalyptic number.

221212220110 is an abundant number, since it is smaller than the sum of its proper divisors (251566247090).

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

221212220110 is a wasteful number, since it uses less digits than its factorization.

221212220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467965.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221212220110 its reverse (11022212122), we get a palindrome (232234432232).

The spelling of 221212220110 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, one hundred ten".