21343133101 has 2 divisors, whose sum is σ = 21343133102. Its totient is φ = 21343133100.

The previous prime is 21343133099. The next prime is 21343133117. The reversal of 21343133101 is 10133134312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16071647076 + 5271486025 = 126774^2 + 72605^2 .

It is a cyclic number.

It is not a de Polignac number, because 21343133101 - 2¹ = 21343133099 is a prime.

Together with 21343133099, 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 (21343833101) 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, 10671566550 + 10671566551.

It is an arithmetic number, because the mean of its divisors is an integer number (10671566551).

Almost surely, 2^21343133101 is an apocalyptic number.

It is an amenable number.

21343133101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343133101 is an equidigital number, since it uses as much as digits as its factorization.

21343133101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21343133101 its reverse (10133134312), we get a palindrome (31476267413).

The spelling of 21343133101 in words is "twenty-one billion, three hundred forty-three million, one hundred thirty-three thousand, one hundred one".