12231033331221 has 6 divisors (see below), whose sum is σ = 17667048145110. Its totient is φ = 8154022220808.

The previous prime is 12231033331183. The next prime is 12231033331259. The reversal of 12231033331221 is 12213333013221.

12231033331221 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 10 + 333 + 312 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12231033331183) and next prime (12231033331259).

It can be written as a sum of positive squares in only one way, i.e., 6345290468196 + 5885742863025 = 2518986^2 + 2426055^2 .

It is not a de Polignac number, because 12231033331221 - 2³⁸ = 11956155424277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231033331271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 679501851726 + ... + 679501851743.

It is an arithmetic number, because the mean of its divisors is an integer number (2944508024185).

Almost surely, 2^{12231033331221} is an apocalyptic number.

It is an amenable number.

12231033331221 is a deficient number, since it is larger than the sum of its proper divisors (5436014813889).

12231033331221 is a wasteful number, since it uses less digits than its factorization.

12231033331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359003703475 (or 1359003703472 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 12231033331221 its reverse (12213333013221), we get a palindrome (24444366344442).

The spelling of 12231033331221 in words is "twelve trillion, two hundred thirty-one billion, thirty-three million, three hundred thirty-one thousand, two hundred twenty-one".