12211221110 has 64 divisors (see below), whose sum is σ = 24943464000. Its totient is φ = 4263436800.

The previous prime is 12211221109. The next prime is 12211221151. The reversal of 12211221110 is 1112211221.

It is a super-2 number, since 2×12211221110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566816 + ... + 587964.

It is an arithmetic number, because the mean of its divisors is an integer number (389741625).

Almost surely, 2^12211221110 is an apocalyptic number.

12211221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211221110 is an abundant number, since it is smaller than the sum of its proper divisors (12732242890).

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

12211221110 is a wasteful number, since it uses less digits than its factorization.

12211221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21377.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12211221110 its reverse (1112211221), we get a palindrome (13323432331).

The spelling of 12211221110 in words is "twelve billion, two hundred eleven million, two hundred twenty-one thousand, one hundred ten".