801111001001111 has 4 divisors (see below), whose sum is σ = 804907735603224. Its totient is φ = 797314266399000.

The previous prime is 801111001001021. The next prime is 801111001001153. The reversal of 801111001001111 is 111100100111108.

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

It is a cyclic number.

It is not a de Polignac number, because 801111001001111 - 2¹⁸ = 801111000738967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 801111001001111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801111001000111) 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, 1898367300740 + ... + 1898367301161.

It is an arithmetic number, because the mean of its divisors is an integer number (201226933900806).

Almost surely, 2^{801111001001111} is an apocalyptic number.

801111001001111 is a deficient number, since it is larger than the sum of its proper divisors (3796734602113).

801111001001111 is a wasteful number, since it uses less digits than its factorization.

801111001001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796734602112.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 801111001001111 its reverse (111100100111108), we get a palindrome (912211101112219).

The spelling of 801111001001111 in words is "eight hundred one trillion, one hundred eleven billion, one million, one thousand, one hundred eleven".