21052311103 has 2 divisors, whose sum is σ = 21052311104. Its totient is φ = 21052311102.

The previous prime is 21052310989. The next prime is 21052311107. The reversal of 21052311103 is 30111325012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21052311103 is a prime.

It is a super-3 number, since 3×21052311103³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21052311107) 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, 10526155551 + 10526155552.

It is an arithmetic number, because the mean of its divisors is an integer number (10526155552).

Almost surely, 2^21052311103 is an apocalyptic number.

21052311103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21052311103 is an equidigital number, since it uses as much as digits as its factorization.

21052311103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 21052311103 its reverse (30111325012), we get a palindrome (51163636115).

The spelling of 21052311103 in words is "twenty-one billion, fifty-two million, three hundred eleven thousand, one hundred three".