1321121504 has 24 divisors (see below), whose sum is σ = 2603224008. Its totient is φ = 659985280.

The previous prime is 1321121497. The next prime is 1321121563. The reversal of 1321121504 is 4051211231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20594 + ... + 55374.

It is an arithmetic number, because the mean of its divisors is an integer number (108467667).

Almost surely, 2^1321121504 is an apocalyptic number.

It is an amenable number.

1321121504 is a deficient number, since it is larger than the sum of its proper divisors (1282102504).

1321121504 is a wasteful number, since it uses less digits than its factorization.

1321121504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35978 (or 35970 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1321121504 is about 36347.2351630767. The cubic root of 1321121504 is about 1097.2718908517.

Adding to 1321121504 its reverse (4051211231), we get a palindrome (5372332735).

The spelling of 1321121504 in words is "one billion, three hundred twenty-one million, one hundred twenty-one thousand, five hundred four".