1091064421247 has 2 divisors, whose sum is σ = 1091064421248. Its totient is φ = 1091064421246.

The previous prime is 1091064421243. The next prime is 1091064421253. The reversal of 1091064421247 is 7421244601901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091064421247 - 2² = 1091064421243 is a prime.

It is a super-2 number, since 2×1091064421247² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091064421243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545532210623 + 545532210624.

It is an arithmetic number, because the mean of its divisors is an integer number (545532210624).

Almost surely, 2^{1091064421247} is an apocalyptic number.

1091064421247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091064421247 is an equidigital number, since it uses as much as digits as its factorization.

1091064421247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 1091064421247 in words is "one trillion, ninety-one billion, sixty-four million, four hundred twenty-one thousand, two hundred forty-seven".