21302120233 has 8 divisors (see below), whose sum is σ = 21561464736. Its totient is φ = 21042840000.

The previous prime is 21302120207. The next prime is 21302120251. The reversal of 21302120233 is 33202120312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21302120233 - 2¹⁷ = 21301989161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21302120233.

It is not an unprimeable number, because it can be changed into a prime (21302120293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286658 + ... + 1303108.

It is an arithmetic number, because the mean of its divisors is an integer number (2695183092).

Almost surely, 2^21302120233 is an apocalyptic number.

It is an amenable number.

21302120233 is a deficient number, since it is larger than the sum of its proper divisors (259344503).

21302120233 is a wasteful number, since it uses less digits than its factorization.

21302120233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32135.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21302120233 its reverse (33202120312), we get a palindrome (54504240545).

The spelling of 21302120233 in words is "twenty-one billion, three hundred two million, one hundred twenty thousand, two hundred thirty-three".