12031211113221 has 16 divisors (see below), whose sum is σ = 16267690003968. Its totient is φ = 7907771718000.

The previous prime is 12031211113217. The next prime is 12031211113223. The reversal of 12031211113221 is 12231111213021.

It is not a de Polignac number, because 12031211113221 - 2² = 12031211113217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031211113223) 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, 49095046 + ... + 49339496.

It is an arithmetic number, because the mean of its divisors is an integer number (1016730625248).

Almost surely, 2^{12031211113221} is an apocalyptic number.

It is an amenable number.

12031211113221 is a deficient number, since it is larger than the sum of its proper divisors (4236478890747).

12031211113221 is a wasteful number, since it uses less digits than its factorization.

12031211113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475592.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 12031211113221 its reverse (12231111213021), we get a palindrome (24262322326242).

The spelling of 12031211113221 in words is "twelve trillion, thirty-one billion, two hundred eleven million, one hundred thirteen thousand, two hundred twenty-one".