12212221110 has 32 divisors (see below), whose sum is σ = 30101477472. Its totient is φ = 3168576000.

The previous prime is 12212221097. The next prime is 12212221129. The reversal of 12212221110 is 1112221221.

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 12212221110.

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, 5499891 + ... + 5502110.

It is an arithmetic number, because the mean of its divisors is an integer number (940671171).

Almost surely, 2^12212221110 is an apocalyptic number.

12212221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12212221110 is an abundant number, since it is smaller than the sum of its proper divisors (17889256362).

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

12212221110 is a wasteful number, since it uses less digits than its factorization.

12212221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11002048.

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

Adding to 12212221110 its reverse (1112221221), we get a palindrome (13324442331).

The spelling of 12212221110 in words is "twelve billion, two hundred twelve million, two hundred twenty-one thousand, one hundred ten".