1111001100001 has 4 divisors (see below), whose sum is σ = 1196462723092. Its totient is φ = 1025539476912.

The previous prime is 1111001099987. The next prime is 1111001100017. The reversal of 1111001100001 is 1000011001111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 684168851025 + 426832248976 = 827145^2 + 653324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111001100001 - 2¹⁵ = 1111001067233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111001100091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42730811526 + ... + 42730811551.

It is an arithmetic number, because the mean of its divisors is an integer number (299115680773).

Almost surely, 2^{1111001100001} is an apocalyptic number.

It is an amenable number.

1111001100001 is a deficient number, since it is larger than the sum of its proper divisors (85461623091).

1111001100001 is an equidigital number, since it uses as much as digits as its factorization.

1111001100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85461623090.

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 1111001100001 its reverse (1000011001111), we get a palindrome (2111012101112).

The spelling of 1111001100001 in words is "one trillion, one hundred eleven billion, one million, one hundred thousand, one".