21341414261 has 2 divisors, whose sum is σ = 21341414262. Its totient is φ = 21341414260.

The previous prime is 21341414233. The next prime is 21341414377. The reversal of 21341414261 is 16241414312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16019711761 + 5321702500 = 126569^2 + 72950^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341414261 - 2⁶ = 21341414197 is a prime.

It is a super-2 number, since 2×21341414261² (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 (21341414201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670707130 + 10670707131.

It is an arithmetic number, because the mean of its divisors is an integer number (10670707131).

Almost surely, 2^21341414261 is an apocalyptic number.

It is an amenable number.

21341414261 is a deficient number, since it is larger than the sum of its proper divisors (1).

21341414261 is an equidigital number, since it uses as much as digits as its factorization.

21341414261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

Adding to 21341414261 its reverse (16241414312), we get a palindrome (37582828573).

The spelling of 21341414261 in words is "twenty-one billion, three hundred forty-one million, four hundred fourteen thousand, two hundred sixty-one".