21233010289 has 2 divisors, whose sum is σ = 21233010290. Its totient is φ = 21233010288.

The previous prime is 21233010287. The next prime is 21233010313. The reversal of 21233010289 is 98201033212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20118585600 + 1114424689 = 141840^2 + 33383^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233010289 - 2¹ = 21233010287 is a prime.

Together with 21233010287, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21233010289.

It is not a weakly prime, because it can be changed into another prime (21233010287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616505144 + 10616505145.

It is an arithmetic number, because the mean of its divisors is an integer number (10616505145).

Almost surely, 2^21233010289 is an apocalyptic number.

It is an amenable number.

21233010289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233010289 is an equidigital number, since it uses as much as digits as its factorization.

21233010289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21233010289 in words is "twenty-one billion, two hundred thirty-three million, ten thousand, two hundred eighty-nine".