720111011111 has 2 divisors, whose sum is σ = 720111011112. Its totient is φ = 720111011110.

The previous prime is 720111011107. The next prime is 720111011119. The reversal of 720111011111 is 111110111027.

It is a weak prime.

It is an emirp because it is prime and its reverse (111110111027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720111011111 - 2² = 720111011107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720111011111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720111011119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360055505555 + 360055505556.

It is an arithmetic number, because the mean of its divisors is an integer number (360055505556).

Almost surely, 2^720111011111 is an apocalyptic number.

720111011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

720111011111 is an equidigital number, since it uses as much as digits as its factorization.

720111011111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14, while the sum is 17.

Adding to 720111011111 its reverse (111110111027), we get a palindrome (831221122138).

The spelling of 720111011111 in words is "seven hundred twenty billion, one hundred eleven million, eleven thousand, one hundred eleven".