21303021010267 has 2 divisors, whose sum is σ = 21303021010268. Its totient is φ = 21303021010266.

The previous prime is 21303021010231. The next prime is 21303021010307. The reversal of 21303021010267 is 76201012030312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21303021010267 - 2¹⁹ = 21303020485979 is a prime.

It is a super-2 number, since 2×21303021010267² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21303021010367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651510505133 + 10651510505134.

It is an arithmetic number, because the mean of its divisors is an integer number (10651510505134).

Almost surely, 2^{21303021010267} is an apocalyptic number.

21303021010267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303021010267 is an equidigital number, since it uses as much as digits as its factorization.

21303021010267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 21303021010267 its reverse (76201012030312), we get a palindrome (97504033040579).

The spelling of 21303021010267 in words is "twenty-one trillion, three hundred three billion, twenty-one million, ten thousand, two hundred sixty-seven".