1099895440081 has 3 divisors (see below), whose sum is σ = 1099896488841. Its totient is φ = 1099894391322.

The previous prime is 1099895440019. The next prime is 1099895440093. The reversal of 1099895440081 is 1800445989901.

The square root of 1099895440081 is 1048759.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1099895440081 - 2⁹ = 1099895439569 is a prime.

It is a super-2 number, since 2×1099895440081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1099895439998 and 1099895440025.

It is not an unprimeable number, because it can be changed into a prime (1099895440181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 524380 + ... + 1573138.

It is an arithmetic number, because the mean of its divisors is an integer number (366632162947).

Almost surely, 2^{1099895440081} is an apocalyptic number.

1099895440081 is the 1048759-th square number.

1099895440081 is the 524380-th centered octagonal number.

It is an amenable number.

1099895440081 is a deficient number, since it is larger than the sum of its proper divisors (1048760).

1099895440081 is an frugal number, since it uses more digits than its factorization.

1099895440081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097518 (or 1048759 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 58.

The spelling of 1099895440081 in words is "one trillion, ninety-nine billion, eight hundred ninety-five million, four hundred forty thousand, eighty-one".