111021211243 has 2 divisors, whose sum is σ = 111021211244. Its totient is φ = 111021211242.

The previous prime is 111021211199. The next prime is 111021211247. The reversal of 111021211243 is 342112120111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021211243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111021211243.

It is not a weakly prime, because it can be changed into another prime (111021211247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510605621 + 55510605622.

It is an arithmetic number, because the mean of its divisors is an integer number (55510605622).

Almost surely, 2^111021211243 is an apocalyptic number.

111021211243 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021211243 is an equidigital number, since it uses as much as digits as its factorization.

111021211243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 111021211243 its reverse (342112120111), we get a palindrome (453133331354).

The spelling of 111021211243 in words is "one hundred eleven billion, twenty-one million, two hundred eleven thousand, two hundred forty-three".