391112011111 has 4 divisors (see below), whose sum is σ = 391228382224. Its totient is φ = 390995640000.

The previous prime is 391112011057. The next prime is 391112011123. The reversal of 391112011111 is 111110211193.

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 391112011111 - 2¹⁵ = 391111978343 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 (391112011211) 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, 58180515 + ... + 58187236.

It is an arithmetic number, because the mean of its divisors is an integer number (97807095556).

Almost surely, 2^391112011111 is an apocalyptic number.

391112011111 is a deficient number, since it is larger than the sum of its proper divisors (116371113).

391112011111 is a wasteful number, since it uses less digits than its factorization.

391112011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116371112.

The product of its (nonzero) digits is 54, while the sum is 22.

The spelling of 391112011111 in words is "three hundred ninety-one billion, one hundred twelve million, eleven thousand, one hundred eleven".