11221101533 has 2 divisors, whose sum is σ = 11221101534. Its totient is φ = 11221101532.

The previous prime is 11221101443. The next prime is 11221101547. The reversal of 11221101533 is 33510112211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10757216089 + 463885444 = 103717^2 + 21538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221101533 is a prime.

It is a super-2 number, since 2×11221101533² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221101553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610550766 + 5610550767.

It is an arithmetic number, because the mean of its divisors is an integer number (5610550767).

Almost surely, 2^11221101533 is an apocalyptic number.

It is an amenable number.

11221101533 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221101533 is an equidigital number, since it uses as much as digits as its factorization.

11221101533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 11221101533 its reverse (33510112211), we get a palindrome (44731213744).

The spelling of 11221101533 in words is "eleven billion, two hundred twenty-one million, one hundred one thousand, five hundred thirty-three".