1213321422191 has 2 divisors, whose sum is σ = 1213321422192. Its totient is φ = 1213321422190.

The previous prime is 1213321422167. The next prime is 1213321422217. The reversal of 1213321422191 is 1912241233121.

It is a weak prime.

It is an emirp because it is prime and its reverse (1912241233121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213321422191 - 2¹⁰ = 1213321421167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213321422151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606660711095 + 606660711096.

It is an arithmetic number, because the mean of its divisors is an integer number (606660711096).

Almost surely, 2^{1213321422191} is an apocalyptic number.

1213321422191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213321422191 is an equidigital number, since it uses as much as digits as its factorization.

1213321422191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The spelling of 1213321422191 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, four hundred twenty-two thousand, one hundred ninety-one".