11311021133 has 2 divisors, whose sum is σ = 11311021134. Its totient is φ = 11311021132.

The previous prime is 11311021103. The next prime is 11311021153. The reversal of 11311021133 is 33112011311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6276125284 + 5034895849 = 79222^2 + 70957^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311021133 - 2⁶ = 11311021069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11311021103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655510566 + 5655510567.

It is an arithmetic number, because the mean of its divisors is an integer number (5655510567).

Almost surely, 2^11311021133 is an apocalyptic number.

It is an amenable number.

11311021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311021133 is an equidigital number, since it uses as much as digits as its factorization.

11311021133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11311021133 its reverse (33112011311), we get a palindrome (44423032444).

The spelling of 11311021133 in words is "eleven billion, three hundred eleven million, twenty-one thousand, one hundred thirty-three".