21361742711 has 2 divisors, whose sum is σ = 21361742712. Its totient is φ = 21361742710.

The previous prime is 21361742687. The next prime is 21361742713. The reversal of 21361742711 is 11724716312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21361742711 - 2¹⁴ = 21361726327 is a prime.

Together with 21361742713, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21361742713) 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, 10680871355 + 10680871356.

It is an arithmetic number, because the mean of its divisors is an integer number (10680871356).

Almost surely, 2^21361742711 is an apocalyptic number.

21361742711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21361742711 is an equidigital number, since it uses as much as digits as its factorization.

21361742711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The spelling of 21361742711 in words is "twenty-one billion, three hundred sixty-one million, seven hundred forty-two thousand, seven hundred eleven".