1011440320091 has 2 divisors, whose sum is σ = 1011440320092. Its totient is φ = 1011440320090.

The previous prime is 1011440320061. The next prime is 1011440320097. The reversal of 1011440320091 is 1900230441101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011440320091 - 2¹⁰ = 1011440319067 is a prime.

It is a super-2 number, since 2×1011440320091² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1011440320091.

It is not a weakly prime, because it can be changed into another prime (1011440320097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505720160045 + 505720160046.

It is an arithmetic number, because the mean of its divisors is an integer number (505720160046).

Almost surely, 2^{1011440320091} is an apocalyptic number.

1011440320091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011440320091 is an equidigital number, since it uses as much as digits as its factorization.

1011440320091 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 26.

Adding to 1011440320091 its reverse (1900230441101), we get a palindrome (2911670761192).

The spelling of 1011440320091 in words is "one trillion, eleven billion, four hundred forty million, three hundred twenty thousand, ninety-one".