21113245411 has 2 divisors, whose sum is σ = 21113245412. Its totient is φ = 21113245410.

The previous prime is 21113245399. The next prime is 21113245441. The reversal of 21113245411 is 11454231112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113245411 - 2⁹ = 21113244899 is a prime.

It is a super-2 number, since 2×21113245411² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21113245441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556622705 + 10556622706.

It is an arithmetic number, because the mean of its divisors is an integer number (10556622706).

Almost surely, 2^21113245411 is an apocalyptic number.

21113245411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113245411 is an equidigital number, since it uses as much as digits as its factorization.

21113245411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

Adding to 21113245411 its reverse (11454231112), we get a palindrome (32567476523).

The spelling of 21113245411 in words is "twenty-one billion, one hundred thirteen million, two hundred forty-five thousand, four hundred eleven".