1221241232 has 60 divisors (see below), whose sum is σ = 2447445660. Its totient is φ = 590277888.

The previous prime is 1221241213. The next prime is 1221241267. The reversal of 1221241232 is 2321421221.

It can be written as a sum of positive squares in 2 ways, for example, as 404653456 + 816587776 = 20116^2 + 28576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3852338 + ... + 3852654.

It is an arithmetic number, because the mean of its divisors is an integer number (40790761).

Almost surely, 2^1221241232 is an apocalyptic number.

It is an amenable number.

1221241232 is an abundant number, since it is smaller than the sum of its proper divisors (1226204428).

1221241232 is a wasteful number, since it uses less digits than its factorization.

1221241232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 475 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 1221241232 is about 34946.2620604837. The cubic root of 1221241232 is about 1068.8919825413.

Adding to 1221241232 its reverse (2321421221), we get a palindrome (3542662453).

The spelling of 1221241232 in words is "one billion, two hundred twenty-one million, two hundred forty-one thousand, two hundred thirty-two".