21202301233 has 8 divisors (see below), whose sum is σ = 21326667336. Its totient is φ = 21078220800.

The previous prime is 21202301221. The next prime is 21202301257. The reversal of 21202301233 is 33210320212.

It can be written as a sum of positive squares in 4 ways, for example, as 2664934129 + 18537367104 = 51623^2 + 136152^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202301233 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 21202301233.

It is not an unprimeable number, because it can be changed into a prime (21202301033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78373 + ... + 220333.

It is an arithmetic number, because the mean of its divisors is an integer number (2665833417).

Almost surely, 2^21202301233 is an apocalyptic number.

It is an amenable number.

21202301233 is a deficient number, since it is larger than the sum of its proper divisors (124366103).

21202301233 is a wasteful number, since it uses less digits than its factorization.

21202301233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142835.

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

Adding to 21202301233 its reverse (33210320212), we get a palindrome (54412621445).

The spelling of 21202301233 in words is "twenty-one billion, two hundred two million, three hundred one thousand, two hundred thirty-three".