33123013021 has 16 divisors (see below), whose sum is σ = 39087710208. Its totient is φ = 27467074800.

The previous prime is 33123013013. The next prime is 33123013051. The reversal of 33123013021 is 12031032133.

It is a cyclic number.

It is not a de Polignac number, because 33123013021 - 2³ = 33123013013 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 33123013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33123013051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765126 + ... + 807256.

It is an arithmetic number, because the mean of its divisors is an integer number (2442981888).

Almost surely, 2^33123013021 is an apocalyptic number.

33123013021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33123013021 is a deficient number, since it is larger than the sum of its proper divisors (5964697187).

33123013021 is a wasteful number, since it uses less digits than its factorization.

33123013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45792.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 33123013021 its reverse (12031032133), we get a palindrome (45154045154).

The spelling of 33123013021 in words is "thirty-three billion, one hundred twenty-three million, thirteen thousand, twenty-one".