1222121089361 has 2 divisors, whose sum is σ = 1222121089362. Its totient is φ = 1222121089360.

The previous prime is 1222121089339. The next prime is 1222121089363. The reversal of 1222121089361 is 1639801212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206359542336 + 15761547025 = 1098344^2 + 125545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222121089361 - 2¹⁸ = 1222120827217 is a prime.

Together with 1222121089363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1222121089363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060544680 + 611060544681.

It is an arithmetic number, because the mean of its divisors is an integer number (611060544681).

Almost surely, 2^{1222121089361} is an apocalyptic number.

It is an amenable number.

1222121089361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222121089361 is an equidigital number, since it uses as much as digits as its factorization.

1222121089361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 1222121089361 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, eighty-nine thousand, three hundred sixty-one".