12221220122112 has 40 divisors (see below), whose sum is σ = 32558094235656. Its totient is φ = 4073740040192.

The previous prime is 12221220122081. The next prime is 12221220122113. The reversal of 12221220122112 is 21122102212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221220122113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3978260223 + ... + 3978263294.

Almost surely, 2^{12221220122112} is an apocalyptic number.

12221220122112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221220122112 is an abundant number, since it is smaller than the sum of its proper divisors (20336874113544).

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

12221220122112 is an frugal number, since it uses more digits than its factorization.

12221220122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956523538 (or 7956523522 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221220122112 its reverse (21122102212221), we get a palindrome (33343322334333).

The spelling of 12221220122112 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twelve".