11211221233 has 2 divisors, whose sum is σ = 11211221234. Its totient is φ = 11211221232.

The previous prime is 11211221221. The next prime is 11211221243. The reversal of 11211221233 is 33212211211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8038377649 + 3172843584 = 89657^2 + 56328^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211221233 - 2⁵ = 11211221201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11211221233.

It is not a weakly prime, because it can be changed into another prime (11211221243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605610616 + 5605610617.

It is an arithmetic number, because the mean of its divisors is an integer number (5605610617).

Almost surely, 2^11211221233 is an apocalyptic number.

It is an amenable number.

11211221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211221233 is an equidigital number, since it uses as much as digits as its factorization.

11211221233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

Adding to 11211221233 its reverse (33212211211), we get a palindrome (44423432444).

The spelling of 11211221233 in words is "eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirty-three".