1321213424 has 10 divisors (see below), whose sum is σ = 2559851040. Its totient is φ = 660606704.

The previous prime is 1321213417. The next prime is 1321213441. The reversal of 1321213424 is 4243121231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321213424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41287904 + ... + 41287935.

It is an arithmetic number, because the mean of its divisors is an integer number (255985104).

Almost surely, 2^1321213424 is an apocalyptic number.

It is an amenable number.

1321213424 is a deficient number, since it is larger than the sum of its proper divisors (1238637616).

1321213424 is an equidigital number, since it uses as much as digits as its factorization.

1321213424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82575847 (or 82575841 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 1321213424 is about 36348.4996114007. The cubic root of 1321213424 is about 1097.2973386481.

Adding to 1321213424 its reverse (4243121231), we get a palindrome (5564334655).

The spelling of 1321213424 in words is "one billion, three hundred twenty-one million, two hundred thirteen thousand, four hundred twenty-four".