21013410511 has 2 divisors, whose sum is σ = 21013410512. Its totient is φ = 21013410510.

The previous prime is 21013410499. The next prime is 21013410521. The reversal of 21013410511 is 11501431012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21013410511 - 2¹⁵ = 21013377743 is a prime.

It is a super-2 number, since 2×21013410511² (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 (21013410521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506705255 + 10506705256.

It is an arithmetic number, because the mean of its divisors is an integer number (10506705256).

Almost surely, 2^21013410511 is an apocalyptic number.

21013410511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013410511 is an equidigital number, since it uses as much as digits as its factorization.

21013410511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21013410511 its reverse (11501431012), we get a palindrome (32514841523).

The spelling of 21013410511 in words is "twenty-one billion, thirteen million, four hundred ten thousand, five hundred eleven".