1221231324 has 48 divisors (see below), whose sum is σ = 2976220800. Its totient is φ = 389353536.

The previous prime is 1221231317. The next prime is 1221231331. The reversal of 1221231324 is 4231321221.

It is an interprime number because it is at equal distance from previous prime (1221231317) and next prime (1221231331).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1221231324.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2887 + ... + 49505.

It is an arithmetic number, because the mean of its divisors is an integer number (62004600).

Almost surely, 2^1221231324 is an apocalyptic number.

It is an amenable number.

1221231324 is an abundant number, since it is smaller than the sum of its proper divisors (1754989476).

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

1221231324 is a wasteful number, since it uses less digits than its factorization.

1221231324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46722 (or 46720 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1221231324 is about 34946.1202996842. The cubic root of 1221231324 is about 1068.8890918729.

Adding to 1221231324 its reverse (4231321221), we get a palindrome (5452552545).

The spelling of 1221231324 in words is "one billion, two hundred twenty-one million, two hundred thirty-one thousand, three hundred twenty-four".