12212221221131 has 2 divisors, whose sum is σ = 12212221221132. Its totient is φ = 12212221221130.

The previous prime is 12212221221113. The next prime is 12212221221169. The reversal of 12212221221131 is 13112212221221.

Together with previous prime (12212221221113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (13112212221221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12212221221131 - 2²⁶ = 12212154112267 is a prime.

It is a super-2 number, since 2×12212221221131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12212221221097 and 12212221221106.

It is not a weakly prime, because it can be changed into another prime (12212221721131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106110610565 + 6106110610566.

It is an arithmetic number, because the mean of its divisors is an integer number (6106110610566).

Almost surely, 2^{12212221221131} is an apocalyptic number.

12212221221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212221221131 is an equidigital number, since it uses as much as digits as its factorization.

12212221221131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

Adding to 12212221221131 its reverse (13112212221221), we get a palindrome (25324433442352).

The spelling of 12212221221131 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-one".