21000102021233 has 2 divisors, whose sum is σ = 21000102021234. Its totient is φ = 21000102021232.

The previous prime is 21000102021211. The next prime is 21000102021299. The reversal of 21000102021233 is 33212020100012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17204178475264 + 3795923545969 = 4147792^2 + 1948313^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000102021233 - 2¹⁸ = 21000101759089 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000101021233) 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, 10500051010616 + 10500051010617.

It is an arithmetic number, because the mean of its divisors is an integer number (10500051010617).

Almost surely, 2^{21000102021233} is an apocalyptic number.

It is an amenable number.

21000102021233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000102021233 is an equidigital number, since it uses as much as digits as its factorization.

21000102021233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000102021233 its reverse (33212020100012), we get a palindrome (54212122121245).

The spelling of 21000102021233 in words is "twenty-one trillion, one hundred two million, twenty-one thousand, two hundred thirty-three".