221221221102110 has 16 divisors (see below), whose sum is σ = 398200281217632. Its totient is φ = 88488025500000.

The previous prime is 221221221102083. The next prime is 221221221102143. The reversal of 221221221102110 is 11201122122122.

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, 55857266 + ... + 59686485.

It is an arithmetic number, because the mean of its divisors is an integer number (24887517576102).

Almost surely, 2^{221221221102110} is an apocalyptic number.

221221221102110 is a deficient number, since it is larger than the sum of its proper divisors (176979060115522).

221221221102110 is a wasteful number, since it uses less digits than its factorization.

221221221102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115735219.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221221221102110 its reverse (11201122122122), we get a palindrome (232422343224232).

The spelling of 221221221102110 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred ten".