12132220121 has 12 divisors (see below), whose sum is σ = 14413269888. Its totient is φ = 10177787592.

The previous prime is 12132220103. The next prime is 12132220147. The reversal of 12132220121 is 12102223121.

It is a de Polignac number, because none of the positive numbers 2^k-12132220121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12132220121.

It is not an unprimeable number, because it can be changed into a prime (12132220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2631701 + ... + 2636306.

It is an arithmetic number, because the mean of its divisors is an integer number (1201105824).

Almost surely, 2^12132220121 is an apocalyptic number.

It is an amenable number.

12132220121 is a deficient number, since it is larger than the sum of its proper divisors (2281049767).

12132220121 is an equidigital number, since it uses as much as digits as its factorization.

12132220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268068 (or 5268061 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12132220121 its reverse (12102223121), we get a palindrome (24234443242).

The spelling of 12132220121 in words is "twelve billion, one hundred thirty-two million, two hundred twenty thousand, one hundred twenty-one".