1245345222991 has 2 divisors, whose sum is σ = 1245345222992. Its totient is φ = 1245345222990.

The previous prime is 1245345222943. The next prime is 1245345223033. The reversal of 1245345222991 is 1992225435421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245345222991 - 2¹¹ = 1245345220943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245345225991) 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, 622672611495 + 622672611496.

It is an arithmetic number, because the mean of its divisors is an integer number (622672611496).

Almost surely, 2^{1245345222991} is an apocalyptic number.

1245345222991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245345222991 is an equidigital number, since it uses as much as digits as its factorization.

1245345222991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 49.

The spelling of 1245345222991 in words is "one trillion, two hundred forty-five billion, three hundred forty-five million, two hundred twenty-two thousand, nine hundred ninety-one".