12311221110 has 16 divisors (see below), whose sum is σ = 29546930736. Its totient is φ = 3282992288.

The previous prime is 12311221093. The next prime is 12311221127. The reversal of 12311221110 is 1112211321.

It is an interprime number because it is at equal distance from previous prime (12311221093) and next prime (12311221127).

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 12311221110.

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, 205186989 + ... + 205187048.

It is an arithmetic number, because the mean of its divisors is an integer number (1846683171).

Almost surely, 2^12311221110 is an apocalyptic number.

12311221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12311221110 is an abundant number, since it is smaller than the sum of its proper divisors (17235709626).

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

12311221110 is a wasteful number, since it uses less digits than its factorization.

12311221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410374047.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12311221110 its reverse (1112211321), we get a palindrome (13423432431).

The spelling of 12311221110 in words is "twelve billion, three hundred eleven million, two hundred twenty-one thousand, one hundred ten".