232121021 has 8 divisors (see below), whose sum is σ = 253528704. Its totient is φ = 210764320.

The previous prime is 232121011. The next prime is 232121027. The reversal of 232121021 is 120121232.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 232121021 - 2⁶ = 232120957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 232120987 and 232121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232121027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2885 + ... + 21738.

It is an arithmetic number, because the mean of its divisors is an integer number (31691088).

Almost surely, 2^232121021 is an apocalyptic number.

It is an amenable number.

232121021 is a deficient number, since it is larger than the sum of its proper divisors (21407683).

232121021 is a wasteful number, since it uses less digits than its factorization.

232121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25491.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 232121021 is about 15235.5184027325. The cubic root of 232121021 is about 614.5701899136.

Adding to 232121021 its reverse (120121232), we get a palindrome (352242253).

The spelling of 232121021 in words is "two hundred thirty-two million, one hundred twenty-one thousand, twenty-one".