221121120110 has 64 divisors (see below), whose sum is σ = 457335244800. Its totient is φ = 76128854400.

The previous prime is 221121120097. The next prime is 221121120137. The reversal of 221121120110 is 11021121122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3456515 + ... + 3519905.

It is an arithmetic number, because the mean of its divisors is an integer number (7145863200).

Almost surely, 2^221121120110 is an apocalyptic number.

221121120110 is an abundant number, since it is smaller than the sum of its proper divisors (236214124690).

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

221121120110 is a wasteful number, since it uses less digits than its factorization.

221121120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65097.

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

Adding to 221121120110 its reverse (11021121122), we get a palindrome (232142241232).

The spelling of 221121120110 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred ten".