21111121183 has 2 divisors, whose sum is σ = 21111121184. Its totient is φ = 21111121182.

The previous prime is 21111121151. The next prime is 21111121211. The reversal of 21111121183 is 38112111112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21111121183 - 2⁵ = 21111121151 is a prime.

It is a super-2 number, since 2×21111121183² (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 (21111121583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555560591 + 10555560592.

It is an arithmetic number, because the mean of its divisors is an integer number (10555560592).

Almost surely, 2^21111121183 is an apocalyptic number.

21111121183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111121183 is an equidigital number, since it uses as much as digits as its factorization.

21111121183 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 22.

Adding to 21111121183 its reverse (38112111112), we get a palindrome (59223232295).

The spelling of 21111121183 in words is "twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred eighty-three".