221220212110 has 32 divisors (see below), whose sum is σ = 400591526400. Its totient is φ = 87957420960.

The previous prime is 221220212077. The next prime is 221220212113. The reversal of 221220212110 is 11212022122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220212113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1017421 + ... + 1215559.

It is an arithmetic number, because the mean of its divisors is an integer number (12518485200).

Almost surely, 2^221220212110 is an apocalyptic number.

221220212110 is a deficient number, since it is larger than the sum of its proper divisors (179371314290).

221220212110 is a wasteful number, since it uses less digits than its factorization.

221220212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198816.

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

Adding to 221220212110 its reverse (11212022122), we get a palindrome (232432234232).

The spelling of 221220212110 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred ten".