33121423243 has 4 divisors (see below), whose sum is σ = 33126723000. Its totient is φ = 33116123488.

The previous prime is 33121423213. The next prime is 33121423253. The reversal of 33121423243 is 34232412133.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33121423243 - 2²⁵ = 33087868811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33121423213) 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, 2640493 + ... + 2653006.

It is an arithmetic number, because the mean of its divisors is an integer number (8281680750).

Almost surely, 2^33121423243 is an apocalyptic number.

33121423243 is a deficient number, since it is larger than the sum of its proper divisors (5299757).

33121423243 is an equidigital number, since it uses as much as digits as its factorization.

33121423243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299756.

The product of its digits is 10368, while the sum is 28.

Adding to 33121423243 its reverse (34232412133), we get a palindrome (67353835376).

The spelling of 33121423243 in words is "thirty-three billion, one hundred twenty-one million, four hundred twenty-three thousand, two hundred forty-three".