21101302233 has 24 divisors (see below), whose sum is σ = 33504378336. Its totient is φ = 12691036800.

The previous prime is 21101302223. The next prime is 21101302247. The reversal of 21101302233 is 33220310112.

It is not a de Polignac number, because 21101302233 - 2¹⁰ = 21101301209 is a prime.

It is a super-3 number, since 3×21101302233³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101302223) 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 23 ways as a sum of consecutive naturals, for example, 800560 + ... + 826497.

It is an arithmetic number, because the mean of its divisors is an integer number (1396015764).

Almost surely, 2^21101302233 is an apocalyptic number.

It is an amenable number.

21101302233 is a deficient number, since it is larger than the sum of its proper divisors (12403076103).

21101302233 is a wasteful number, since it uses less digits than its factorization.

21101302233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627205 (or 1627202 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21101302233 its reverse (33220310112), we get a palindrome (54321612345).

The spelling of 21101302233 in words is "twenty-one billion, one hundred one million, three hundred two thousand, two hundred thirty-three".