33121423213 has 2 divisors, whose sum is σ = 33121423214. Its totient is φ = 33121423212.

The previous prime is 33121423207. The next prime is 33121423253. The reversal of 33121423213 is 31232412133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27610142569 + 5511280644 = 166163^2 + 74238^2 .

It is a cyclic number.

It is not a de Polignac number, because 33121423213 - 2³³ = 24531488621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33121423253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560711606 + 16560711607.

It is an arithmetic number, because the mean of its divisors is an integer number (16560711607).

Almost surely, 2^33121423213 is an apocalyptic number.

It is an amenable number.

33121423213 is a deficient number, since it is larger than the sum of its proper divisors (1).

33121423213 is an equidigital number, since it uses as much as digits as its factorization.

33121423213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

Adding to 33121423213 its reverse (31232412133), we get a palindrome (64353835346).

The spelling of 33121423213 in words is "thirty-three billion, one hundred twenty-one million, four hundred twenty-three thousand, two hundred thirteen".