1221210232 has 32 divisors (see below), whose sum is σ = 2644870320. Its totient is φ = 522442240.

The previous prime is 1221210227. The next prime is 1221210239. The reversal of 1221210232 is 2320121221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210239) 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, 406663 + ... + 409654.

Almost surely, 2^1221210232 is an apocalyptic number.

It is an amenable number.

1221210232 is an abundant number, since it is smaller than the sum of its proper divisors (1423660088).

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

1221210232 is a wasteful number, since it uses less digits than its factorization.

1221210232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816351 (or 816347 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221210232 is about 34945.8185195311. The cubic root of 1221210232 is about 1068.8829382098.

Adding to 1221210232 its reverse (2320121221), we get a palindrome (3541331453).

The spelling of 1221210232 in words is "one billion, two hundred twenty-one million, two hundred ten thousand, two hundred thirty-two".