21001023033 has 8 divisors (see below), whose sum is σ = 28002518496. Its totient is φ = 14000104800.

The previous prime is 21001023023. The next prime is 21001023077. The reversal of 21001023033 is 33032010012.

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

It is not a de Polignac number, because 21001023033 - 2⁹ = 21001022521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001023023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50748 + ... + 211133.

It is an arithmetic number, because the mean of its divisors is an integer number (3500314812).

Almost surely, 2^21001023033 is an apocalyptic number.

It is an amenable number.

21001023033 is a deficient number, since it is larger than the sum of its proper divisors (7001495463).

21001023033 is a wasteful number, since it uses less digits than its factorization.

21001023033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288615.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21001023033 its reverse (33032010012), we get a palindrome (54033033045).

The spelling of 21001023033 in words is "twenty-one billion, one million, twenty-three thousand, thirty-three".