12022110021221 has 2 divisors, whose sum is σ = 12022110021222. Its totient is φ = 12022110021220.

The previous prime is 12022110021211. The next prime is 12022110021239. The reversal of 12022110021221 is 12212001122021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10282533676321 + 1739576344900 = 3206639^2 + 1318930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12022110021221 is a prime.

It is a super-2 number, since 2×12022110021221² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12022110021221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12022110021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011055010610 + 6011055010611.

It is an arithmetic number, because the mean of its divisors is an integer number (6011055010611).

Almost surely, 2^{12022110021221} is an apocalyptic number.

It is an amenable number.

12022110021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12022110021221 is an equidigital number, since it uses as much as digits as its factorization.

12022110021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12022110021221 its reverse (12212001122021), we get a palindrome (24234111143242).

The spelling of 12022110021221 in words is "twelve trillion, twenty-two billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".