33203000000021 has 4 divisors (see below), whose sum is σ = 33213405205344. Its totient is φ = 33192594794700.

The previous prime is 33202999999963. The next prime is 33203000000077. The reversal of 33203000000021 is 12000000030233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33203000000021 - 2¹⁰ = 33202999998997 is a prime.

It is a super-2 number, since 2×33203000000021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33202999999942 and 33203000000005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33203000030021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5202597875 + ... + 5202604256.

It is an arithmetic number, because the mean of its divisors is an integer number (8303351301336).

Almost surely, 2^{33203000000021} is an apocalyptic number.

It is an amenable number.

33203000000021 is a deficient number, since it is larger than the sum of its proper divisors (10405205323).

33203000000021 is a wasteful number, since it uses less digits than its factorization.

33203000000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405205322.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 33203000000021 its reverse (12000000030233), we get a palindrome (45203000030254).

The spelling of 33203000000021 in words is "thirty-three trillion, two hundred three billion, twenty-one", and thus it is an aban number.