21010033233 has 32 divisors (see below), whose sum is σ = 35597004800. Its totient is φ = 11997477648.

The previous prime is 21010033159. The next prime is 21010033301. The reversal of 21010033233 is 33233001012.

It is not a de Polignac number, because 21010033233 - 2¹³ = 21010025041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21010033133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242808 + ... + 317766.

It is an arithmetic number, because the mean of its divisors is an integer number (1112406400).

Almost surely, 2^21010033233 is an apocalyptic number.

It is an amenable number.

21010033233 is a deficient number, since it is larger than the sum of its proper divisors (14586971567).

21010033233 is a wasteful number, since it uses less digits than its factorization.

21010033233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76458 (or 76452 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21010033233 its reverse (33233001012), we get a palindrome (54243034245).

The spelling of 21010033233 in words is "twenty-one billion, ten million, thirty-three thousand, two hundred thirty-three".