220121110 has 16 divisors (see below), whose sum is σ = 432238032. Its totient is φ = 80044000.

The previous prime is 220121093. The next prime is 220121141. The reversal of 220121110 is 11121022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000441 + ... + 1000660.

It is an arithmetic number, because the mean of its divisors is an integer number (27014877).

Almost surely, 2^220121110 is an apocalyptic number.

220121110 is a deficient number, since it is larger than the sum of its proper divisors (212116922).

220121110 is a wasteful number, since it uses less digits than its factorization.

220121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001119.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 220121110 is about 14836.4790297429. The cubic root of 220121110 is about 603.7918288357.

Adding to 220121110 its reverse (11121022), we get a palindrome (231242132).

The spelling of 220121110 in words is "two hundred twenty million, one hundred twenty-one thousand, one hundred ten".