12220100012221 has 2 divisors, whose sum is σ = 12220100012222. Its totient is φ = 12220100012220.

The previous prime is 12220100012161. The next prime is 12220100012249. The reversal of 12220100012221 is 12221000102221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7033708668996 + 5186391343225 = 2652114^2 + 2277365^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220100012221 - 2¹⁹ = 12220099487933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220100012195 and 12220100012204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220100012291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110050006110 + 6110050006111.

It is an arithmetic number, because the mean of its divisors is an integer number (6110050006111).

Almost surely, 2^{12220100012221} is an apocalyptic number.

It is an amenable number.

12220100012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220100012221 is an equidigital number, since it uses as much as digits as its factorization.

12220100012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12220100012221 its reverse (12221000102221), we get a palindrome (24441100114442).

The spelling of 12220100012221 in words is "twelve trillion, two hundred twenty billion, one hundred million, twelve thousand, two hundred twenty-one".