1222221110 has 16 divisors (see below), whose sum is σ = 2399998032. Its totient is φ = 444444000.

The previous prime is 1222221109. The next prime is 1222221139. The reversal of 1222221110 is 111222221.

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, 5555441 + ... + 5555660.

It is an arithmetic number, because the mean of its divisors is an integer number (149999877).

Almost surely, 2^1222221110 is an apocalyptic number.

1222221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222221110 is a deficient number, since it is larger than the sum of its proper divisors (1177776922).

1222221110 is a wasteful number, since it uses less digits than its factorization.

1222221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111119.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1222221110 is about 34960.2790320672. The cubic root of 1222221110 is about 1069.1777856812.

Adding to 1222221110 its reverse (111222221), we get a palindrome (1333443331).

It can be divided in two parts, 12222211 and 10, that added together give a palindrome (12222221).

The spelling of 1222221110 in words is "one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred ten".