21012324033 has 8 divisors (see below), whose sum is σ = 28018667200. Its totient is φ = 14007098448.

The previous prime is 21012324031. The next prime is 21012324083. The reversal of 21012324033 is 33042321012.

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

It is not a de Polignac number, because 21012324033 - 2¹ = 21012324031 is a prime.

It is a super-2 number, since 2×21012324033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21012324031) 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, 234493 + ... + 311466.

It is an arithmetic number, because the mean of its divisors is an integer number (3502333400).

Almost surely, 2^21012324033 is an apocalyptic number.

It is an amenable number.

21012324033 is a deficient number, since it is larger than the sum of its proper divisors (7006343167).

21012324033 is a wasteful number, since it uses less digits than its factorization.

21012324033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558791.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21012324033 its reverse (33042321012), we get a palindrome (54054645045).

The spelling of 21012324033 in words is "twenty-one billion, twelve million, three hundred twenty-four thousand, thirty-three".