21302135411 has 2 divisors, whose sum is σ = 21302135412. Its totient is φ = 21302135410.

The previous prime is 21302135401. The next prime is 21302135419. The reversal of 21302135411 is 11453120312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21302135411 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302135419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651067705 + 10651067706.

It is an arithmetic number, because the mean of its divisors is an integer number (10651067706).

Almost surely, 2^21302135411 is an apocalyptic number.

21302135411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302135411 is an equidigital number, since it uses as much as digits as its factorization.

21302135411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21302135411 its reverse (11453120312), we get a palindrome (32755255723).

The spelling of 21302135411 in words is "twenty-one billion, three hundred two million, one hundred thirty-five thousand, four hundred eleven".