28031110111 has 2 divisors, whose sum is σ = 28031110112. Its totient is φ = 28031110110.

The previous prime is 28031110061. The next prime is 28031110123. The reversal of 28031110111 is 11101113082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28031110111 - 2⁹ = 28031109599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28031110511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015555055 + 14015555056.

It is an arithmetic number, because the mean of its divisors is an integer number (14015555056).

Almost surely, 2^28031110111 is an apocalyptic number.

28031110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28031110111 is an equidigital number, since it uses as much as digits as its factorization.

28031110111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 28031110111 its reverse (11101113082), we get a palindrome (39132223193).

The spelling of 28031110111 in words is "twenty-eight billion, thirty-one million, one hundred ten thousand, one hundred eleven".