33123020213 has 4 divisors (see below), whose sum is σ = 34191504768. Its totient is φ = 32054535660.

The previous prime is 33123020209. The next prime is 33123020221. The reversal of 33123020213 is 31202032133.

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 33123020213 - 2² = 33123020209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33123020113) 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, 534242231 + ... + 534242292.

It is an arithmetic number, because the mean of its divisors is an integer number (8547876192).

Almost surely, 2^33123020213 is an apocalyptic number.

It is an amenable number.

33123020213 is a deficient number, since it is larger than the sum of its proper divisors (1068484555).

33123020213 is a wasteful number, since it uses less digits than its factorization.

33123020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068484554.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33123020213 its reverse (31202032133), we get a palindrome (64325052346).

The spelling of 33123020213 in words is "thirty-three billion, one hundred twenty-three million, twenty thousand, two hundred thirteen".