12111222111010 has 128 divisors (see below), whose sum is σ = 24494040023040. Its totient is φ = 4273859116800.

The previous prime is 12111222110989. The next prime is 12111222111017. The reversal of 12111222111010 is 1011122211121.

It is not an unprimeable number, because it can be changed into a prime (12111222111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1332216565 + ... + 1332225655.

It is an arithmetic number, because the mean of its divisors is an integer number (191359687680).

Almost surely, 2^{12111222111010} is an apocalyptic number.

12111222111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111222111010 is an abundant number, since it is smaller than the sum of its proper divisors (12382817912030).

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

12111222111010 is a wasteful number, since it uses less digits than its factorization.

12111222111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11312.

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

Adding to 12111222111010 its reverse (1011122211121), we get a palindrome (13122344322131).

It can be divided in two parts, 1211 and 1222111010, that added together give a palindrome (1222112221).

The spelling of 12111222111010 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, ten".