21533414504213 has 2 divisors, whose sum is σ = 21533414504214. Its totient is φ = 21533414504212.

The previous prime is 21533414504201. The next prime is 21533414504279. The reversal of 21533414504213 is 31240541433512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12687893868049 + 8845520636164 = 3562007^2 + 2974142^2 .

It is a cyclic number.

It is not a de Polignac number, because 21533414504213 - 2²² = 21533410309909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21533414504813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10766707252106 + 10766707252107.

It is an arithmetic number, because the mean of its divisors is an integer number (10766707252107).

Almost surely, 2^{21533414504213} is an apocalyptic number.

It is an amenable number.

21533414504213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21533414504213 is an equidigital number, since it uses as much as digits as its factorization.

21533414504213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 21533414504213 its reverse (31240541433512), we get a palindrome (52773955937725).

The spelling of 21533414504213 in words is "twenty-one trillion, five hundred thirty-three billion, four hundred fourteen million, five hundred four thousand, two hundred thirteen".