12002130131221 has 8 divisors (see below), whose sum is σ = 12449283553080. Its totient is φ = 11557195833792.

The previous prime is 12002130131197. The next prime is 12002130131227. The reversal of 12002130131221 is 12213103120021.

It can be written as a sum of positive squares in 4 ways, for example, as 4022776330596 + 7979353800625 = 2005686^2 + 2824775^2 .

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 12002130131221 - 2⁷ = 12002130131093 is a prime.

It is a super-2 number, since 2×12002130131221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002130131227) 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, 554770090 + ... + 554791723.

It is an arithmetic number, because the mean of its divisors is an integer number (1556160444135).

Almost surely, 2^{12002130131221} is an apocalyptic number.

It is an amenable number.

12002130131221 is a deficient number, since it is larger than the sum of its proper divisors (447153421859).

12002130131221 is a wasteful number, since it uses less digits than its factorization.

12002130131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109562215.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12002130131221 its reverse (12213103120021), we get a palindrome (24215233251242).

The spelling of 12002130131221 in words is "twelve trillion, two billion, one hundred thirty million, one hundred thirty-one thousand, two hundred twenty-one".