12132011221 has 8 divisors (see below), whose sum is σ = 13308861600. Its totient is φ = 10967484240.

The previous prime is 12132011191. The next prime is 12132011261. The reversal of 12132011221 is 12211023121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12132011221 - 2¹⁷ = 12131880149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12132011195 and 12132011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12132011261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3078786 + ... + 3082723.

It is an arithmetic number, because the mean of its divisors is an integer number (1663607700).

Almost surely, 2^12132011221 is an apocalyptic number.

12132011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12132011221 is a deficient number, since it is larger than the sum of its proper divisors (1176850379).

12132011221 is a wasteful number, since it uses less digits than its factorization.

12132011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161699.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12132011221 its reverse (12211023121), we get a palindrome (24343034342).

The spelling of 12132011221 in words is "twelve billion, one hundred thirty-two million, eleven thousand, two hundred twenty-one".