232121220 has 48 divisors (see below), whose sum is σ = 672356160. Its totient is φ = 59764096.

The previous prime is 232121177. The next prime is 232121231. The reversal of 232121220 is 22121232.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 232121220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64962 + ... + 68441.

It is an arithmetic number, because the mean of its divisors is an integer number (14007420).

Almost surely, 2^232121220 is an apocalyptic number.

232121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

232121220 is an abundant number, since it is smaller than the sum of its proper divisors (440234940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

232121220 is a wasteful number, since it uses less digits than its factorization.

232121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133444 (or 133442 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 232121220 is about 15235.5249335230. The cubic root of 232121220 is about 614.5703655395.

Adding to 232121220 its reverse (22121232), we get a palindrome (254242452).

It can be divided in two parts, 2321212 and 20, that added together give a palindrome (2321232).

The spelling of 232121220 in words is "two hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty".