12013132221 has 16 divisors (see below), whose sum is σ = 17822363200. Its totient is φ = 7997446224.

The previous prime is 12013132211. The next prime is 12013132237. The reversal of 12013132221 is 12223131021.

It is not a de Polignac number, because 12013132221 - 2⁵ = 12013132189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12013132194 and 12013132203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013132211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294631 + ... + 332916.

It is an arithmetic number, because the mean of its divisors is an integer number (1113897700).

Almost surely, 2^12013132221 is an apocalyptic number.

It is an amenable number.

12013132221 is a deficient number, since it is larger than the sum of its proper divisors (5809230979).

12013132221 is an equidigital number, since it uses as much as digits as its factorization.

12013132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628265 (or 628259 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12013132221 its reverse (12223131021), we get a palindrome (24236263242).

The spelling of 12013132221 in words is "twelve billion, thirteen million, one hundred thirty-two thousand, two hundred twenty-one".