21133214353 has 2 divisors, whose sum is σ = 21133214354. Its totient is φ = 21133214352.

The previous prime is 21133214309. The next prime is 21133214449. The reversal of 21133214353 is 35341233112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20478468609 + 654745744 = 143103^2 + 25588^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133214353 - 2²¹ = 21131117201 is a prime.

It is a super-2 number, since 2×21133214353² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21133214153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566607176 + 10566607177.

It is an arithmetic number, because the mean of its divisors is an integer number (10566607177).

Almost surely, 2^21133214353 is an apocalyptic number.

It is an amenable number.

21133214353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133214353 is an equidigital number, since it uses as much as digits as its factorization.

21133214353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

Adding to 21133214353 its reverse (35341233112), we get a palindrome (56474447465).

The spelling of 21133214353 in words is "twenty-one billion, one hundred thirty-three million, two hundred fourteen thousand, three hundred fifty-three".