21101230333 has 2 divisors, whose sum is σ = 21101230334. Its totient is φ = 21101230332.

The previous prime is 21101230303. The next prime is 21101230421. The reversal of 21101230333 is 33303210112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21075199929 + 26030404 = 145173^2 + 5102^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101230333 - 2²⁹ = 20564359421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21101230333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101230303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550615166 + 10550615167.

It is an arithmetic number, because the mean of its divisors is an integer number (10550615167).

Almost surely, 2^21101230333 is an apocalyptic number.

It is an amenable number.

21101230333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101230333 is an equidigital number, since it uses as much as digits as its factorization.

21101230333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21101230333 its reverse (33303210112), we get a palindrome (54404440445).

The spelling of 21101230333 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, three hundred thirty-three".