1320440001091 has 2 divisors, whose sum is σ = 1320440001092. Its totient is φ = 1320440001090.

The previous prime is 1320440001073. The next prime is 1320440001121. The reversal of 1320440001091 is 1901000440231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320440001091 - 2⁷ = 1320440000963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320440001031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660220000545 + 660220000546.

It is an arithmetic number, because the mean of its divisors is an integer number (660220000546).

Almost surely, 2^{1320440001091} is an apocalyptic number.

1320440001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320440001091 is an equidigital number, since it uses as much as digits as its factorization.

1320440001091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 1320440001091 in words is "one trillion, three hundred twenty billion, four hundred forty million, one thousand, ninety-one".