12012231130221 has 16 divisors (see below), whose sum is σ = 18305045577728. Its totient is φ = 6863872057200.

The previous prime is 12012231130181. The next prime is 12012231130231. The reversal of 12012231130221 is 12203113221021.

It is not a de Polignac number, because 12012231130221 - 2²¹ = 12012229033069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012231130231) 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, 10265785 + ... + 11375886.

It is an arithmetic number, because the mean of its divisors is an integer number (1144065348608).

Almost surely, 2^{12012231130221} is an apocalyptic number.

It is an amenable number.

12012231130221 is a deficient number, since it is larger than the sum of its proper divisors (6292814447507).

12012231130221 is a wasteful number, since it uses less digits than its factorization.

12012231130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21668112.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12012231130221 its reverse (12203113221021), we get a palindrome (24215344351242).

The spelling of 12012231130221 in words is "twelve trillion, twelve billion, two hundred thirty-one million, one hundred thirty thousand, two hundred twenty-one".