21134411413 has 2 divisors, whose sum is σ = 21134411414. Its totient is φ = 21134411412.

The previous prime is 21134411411. The next prime is 21134411453. The reversal of 21134411413 is 31411443112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20638770244 + 495641169 = 143662^2 + 22263^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134411413 - 2¹ = 21134411411 is a prime.

Together with 21134411411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21134411411) 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, 10567205706 + 10567205707.

It is an arithmetic number, because the mean of its divisors is an integer number (10567205707).

Almost surely, 2^21134411413 is an apocalyptic number.

It is an amenable number.

21134411413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134411413 is an equidigital number, since it uses as much as digits as its factorization.

21134411413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

Adding to 21134411413 its reverse (31411443112), we get a palindrome (52545854525).

The spelling of 21134411413 in words is "twenty-one billion, one hundred thirty-four million, four hundred eleven thousand, four hundred thirteen".