221201122110 has 32 divisors (see below), whose sum is σ = 530906516640. Its totient is φ = 58984318848.

The previous prime is 221201122073. The next prime is 221201122123. The reversal of 221201122110 is 11221102122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221201122110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567444 + ... + 874296.

It is an arithmetic number, because the mean of its divisors is an integer number (16590828645).

Almost surely, 2^221201122110 is an apocalyptic number.

221201122110 is an abundant number, since it is smaller than the sum of its proper divisors (309705394530).

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

221201122110 is a wasteful number, since it uses less digits than its factorization.

221201122110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330892.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221201122110 its reverse (11221102122), we get a palindrome (232422224232).

The spelling of 221201122110 in words is "two hundred twenty-one billion, two hundred one million, one hundred twenty-two thousand, one hundred ten".