12112221100000 has 144 divisors (see below), whose sum is σ = 34063443612576. Its totient is φ = 4152761280000.

The previous prime is 12112221099977. The next prime is 12112221100013. The reversal of 12112221100000 is 112221121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7951587 + ... + 9351586.

It is an arithmetic number, because the mean of its divisors is an integer number (236551691754).

Almost surely, 2^{12112221100000} is an apocalyptic number.

12112221100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112221100000 is an abundant number, since it is smaller than the sum of its proper divisors (21951222512576).

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

12112221100000 is an frugal number, since it uses more digits than its factorization.

12112221100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303215 (or 17303187 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12112221100000 its reverse (112221121), we get a palindrome (12112333321121).

The spelling of 12112221100000 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-one million, one hundred thousand".