231033121 has 4 divisors (see below), whose sum is σ = 252036144. Its totient is φ = 210030100.

The previous prime is 231033119. The next prime is 231033149. The reversal of 231033121 is 121330132.

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 231033121 - 2¹ = 231033119 is a prime.

It is a super-3 number, since 3×231033121³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231033095 and 231033104.

It is not an unprimeable number, because it can be changed into a prime (231033161) 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, 10501495 + ... + 10501516.

It is an arithmetic number, because the mean of its divisors is an integer number (63009036).

Almost surely, 2^231033121 is an apocalyptic number.

It is an amenable number.

231033121 is a deficient number, since it is larger than the sum of its proper divisors (21003023).

231033121 is a wasteful number, since it uses less digits than its factorization.

231033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21003022.

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

The square root of 231033121 is about 15199.7737154209. The cubic root of 231033121 is about 613.6085677569.

Adding to 231033121 its reverse (121330132), we get a palindrome (352363253).

The spelling of 231033121 in words is "two hundred thirty-one million, thirty-three thousand, one hundred twenty-one".