12221012221213 has 2 divisors, whose sum is σ = 12221012221214. Its totient is φ = 12221012221212.

The previous prime is 12221012221153. The next prime is 12221012221247. The reversal of 12221012221213 is 31212221012221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10892290320409 + 1328721900804 = 3300347^2 + 1152702^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221012221213 - 2²⁵ = 12220978666781 is a prime.

It is a super-2 number, since 2×12221012221213² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221012228213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110506110606 + 6110506110607.

It is an arithmetic number, because the mean of its divisors is an integer number (6110506110607).

Almost surely, 2^{12221012221213} is an apocalyptic number.

It is an amenable number.

12221012221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221012221213 is an equidigital number, since it uses as much as digits as its factorization.

12221012221213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12221012221213 its reverse (31212221012221), we get a palindrome (43433233233434).

The spelling of 12221012221213 in words is "twelve trillion, two hundred twenty-one billion, twelve million, two hundred twenty-one thousand, two hundred thirteen".