12031022001221 has 2 divisors, whose sum is σ = 12031022001222. Its totient is φ = 12031022001220.

The previous prime is 12031022001211. The next prime is 12031022001239. The reversal of 12031022001221 is 12210022013021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11951886122500 + 79135878721 = 3457150^2 + 281311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031022001221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12031022001221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031022001211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015511000610 + 6015511000611.

It is an arithmetic number, because the mean of its divisors is an integer number (6015511000611).

Almost surely, 2^{12031022001221} is an apocalyptic number.

It is an amenable number.

12031022001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031022001221 is an equidigital number, since it uses as much as digits as its factorization.

12031022001221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12031022001221 its reverse (12210022013021), we get a palindrome (24241044014242).

The spelling of 12031022001221 in words is "twelve trillion, thirty-one billion, twenty-two million, one thousand, two hundred twenty-one".