21361741267 has 2 divisors, whose sum is σ = 21361741268. Its totient is φ = 21361741266.

The previous prime is 21361741217. The next prime is 21361741273. The reversal of 21361741267 is 76214716312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21361741267 - 2⁷ = 21361741139 is a prime.

It is not a weakly prime, because it can be changed into another prime (21361741217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10680870633 + 10680870634.

It is an arithmetic number, because the mean of its divisors is an integer number (10680870634).

Almost surely, 2^21361741267 is an apocalyptic number.

21361741267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21361741267 is an equidigital number, since it uses as much as digits as its factorization.

21361741267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The spelling of 21361741267 in words is "twenty-one billion, three hundred sixty-one million, seven hundred forty-one thousand, two hundred sixty-seven".