21304444533311 has 2 divisors, whose sum is σ = 21304444533312. Its totient is φ = 21304444533310.

The previous prime is 21304444533301. The next prime is 21304444533329. The reversal of 21304444533311 is 11333544440312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21304444533311 - 2¹⁸ = 21304444271167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21304444533301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652222266655 + 10652222266656.

It is an arithmetic number, because the mean of its divisors is an integer number (10652222266656).

Almost surely, 2^{21304444533311} is an apocalyptic number.

21304444533311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21304444533311 is an equidigital number, since it uses as much as digits as its factorization.

21304444533311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 21304444533311 its reverse (11333544440312), we get a palindrome (32637988973623).

The spelling of 21304444533311 in words is "twenty-one trillion, three hundred four billion, four hundred forty-four million, five hundred thirty-three thousand, three hundred eleven".