21130301111 has 2 divisors, whose sum is σ = 21130301112. Its totient is φ = 21130301110.

The previous prime is 21130301107. The next prime is 21130301167. The reversal of 21130301111 is 11110303112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21130301111 - 2² = 21130301107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130300111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565150555 + 10565150556.

It is an arithmetic number, because the mean of its divisors is an integer number (10565150556).

Almost surely, 2^21130301111 is an apocalyptic number.

21130301111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130301111 is an equidigital number, since it uses as much as digits as its factorization.

21130301111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21130301111 its reverse (11110303112), we get a palindrome (32240604223).

The spelling of 21130301111 in words is "twenty-one billion, one hundred thirty million, three hundred one thousand, one hundred eleven".