21341402273 has 2 divisors, whose sum is σ = 21341402274. Its totient is φ = 21341402272.

The previous prime is 21341402263. The next prime is 21341402317. The reversal of 21341402273 is 37220414312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20993691664 + 347710609 = 144892^2 + 18647^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341402273 - 2²⁶ = 21274293409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21341402213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670701136 + 10670701137.

It is an arithmetic number, because the mean of its divisors is an integer number (10670701137).

Almost surely, 2^21341402273 is an apocalyptic number.

It is an amenable number.

21341402273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21341402273 is an equidigital number, since it uses as much as digits as its factorization.

21341402273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 21341402273 its reverse (37220414312), we get a palindrome (58561816585).

The spelling of 21341402273 in words is "twenty-one billion, three hundred forty-one million, four hundred two thousand, two hundred seventy-three".