233121013 has 4 divisors (see below), whose sum is σ = 245390560. Its totient is φ = 220851468.

The previous prime is 233121011. The next prime is 233121037. The reversal of 233121013 is 310121332.

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 233121013 - 2¹ = 233121011 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 (233121011) 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, 6134745 + ... + 6134782.

It is an arithmetic number, because the mean of its divisors is an integer number (61347640).

Almost surely, 2^233121013 is an apocalyptic number.

It is an amenable number.

233121013 is a deficient number, since it is larger than the sum of its proper divisors (12269547).

233121013 is a wasteful number, since it uses less digits than its factorization.

233121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12269546.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 233121013 is about 15268.3009205347. The cubic root of 233121013 is about 615.4514613127.

Adding to 233121013 its reverse (310121332), we get a palindrome (543242345).

The spelling of 233121013 in words is "two hundred thirty-three million, one hundred twenty-one thousand, thirteen".