21002231201233 has 2 divisors, whose sum is σ = 21002231201234. Its totient is φ = 21002231201232.

The previous prime is 21002231201227. The next prime is 21002231201239. The reversal of 21002231201233 is 33210213220012.

It is a balanced prime because it is at equal distance from previous prime (21002231201227) and next prime (21002231201239).

It can be written as a sum of positive squares in only one way, i.e., 20825240187024 + 176991014209 = 4563468^2 + 420703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002231201233 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002231201239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501115600616 + 10501115600617.

It is an arithmetic number, because the mean of its divisors is an integer number (10501115600617).

Almost surely, 2^{21002231201233} is an apocalyptic number.

It is an amenable number.

21002231201233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002231201233 is an equidigital number, since it uses as much as digits as its factorization.

21002231201233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21002231201233 its reverse (33210213220012), we get a palindrome (54212444421245).

The spelling of 21002231201233 in words is "twenty-one trillion, two billion, two hundred thirty-one million, two hundred one thousand, two hundred thirty-three".