7991012111 has 8 divisors (see below), whose sum is σ = 8016201600. Its totient is φ = 7965849600.

The previous prime is 7991012059. The next prime is 7991012119. The reversal of 7991012111 is 1112101997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7991012111 - 2⁶ = 7991012047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991012119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699695 + ... + 711023.

It is an arithmetic number, because the mean of its divisors is an integer number (1002025200).

Almost surely, 2^7991012111 is an apocalyptic number.

7991012111 is a deficient number, since it is larger than the sum of its proper divisors (25189489).

7991012111 is a wasteful number, since it uses less digits than its factorization.

7991012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13489.

The product of its (nonzero) digits is 1134, while the sum is 32.

The square root of 7991012111 is about 89392.4611530525. The cubic root of 7991012111 is about 1999.2507285812.

The spelling of 7991012111 in words is "seven billion, nine hundred ninety-one million, twelve thousand, one hundred eleven".