11000111231 has 2 divisors, whose sum is σ = 11000111232. Its totient is φ = 11000111230.

The previous prime is 11000111203. The next prime is 11000111267. The reversal of 11000111231 is 13211100011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11000111231 is a prime.

It is a super-2 number, since 2×11000111231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11000111281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500055615 + 5500055616.

It is an arithmetic number, because the mean of its divisors is an integer number (5500055616).

Almost surely, 2^11000111231 is an apocalyptic number.

11000111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000111231 is an equidigital number, since it uses as much as digits as its factorization.

11000111231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 11000111231 its reverse (13211100011), we get a palindrome (24211211242).

The spelling of 11000111231 in words is "eleven billion, one hundred eleven thousand, two hundred thirty-one".