23121013033 has 4 divisors (see below), whose sum is σ = 23122687828. Its totient is φ = 23119338240.

The previous prime is 23121013001. The next prime is 23121013087. The reversal of 23121013033 is 33031012132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6362933824 + 16758079209 = 79768^2 + 129453^2 .

It is a cyclic number.

It is not a de Polignac number, because 23121013033 - 2⁵ = 23121013001 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 23121013033.

It is not an unprimeable number, because it can be changed into a prime (23121013093) 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, 816516 + ... + 844357.

It is an arithmetic number, because the mean of its divisors is an integer number (5780671957).

Almost surely, 2^23121013033 is an apocalyptic number.

It is an amenable number.

23121013033 is a deficient number, since it is larger than the sum of its proper divisors (1674795).

23121013033 is a wasteful number, since it uses less digits than its factorization.

23121013033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674794.

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

Adding to 23121013033 its reverse (33031012132), we get a palindrome (56152025165).

Subtracting 23121013033 from its reverse (33031012132), we obtain a palindrome (9909999099).

The spelling of 23121013033 in words is "twenty-three billion, one hundred twenty-one million, thirteen thousand, thirty-three".