1321103808 has 84 divisors (see below), whose sum is σ = 3951384528. Its totient is φ = 421217280.

The previous prime is 1321103761. The next prime is 1321103851. The reversal of 1321103808 is 8083011231.

It is a congruent number.

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, 36613 + ... + 63108.

It is an arithmetic number, because the mean of its divisors is an integer number (47040292).

Almost surely, 2^1321103808 is an apocalyptic number.

1321103808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1321103808 is an abundant number, since it is smaller than the sum of its proper divisors (2630280720).

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

1321103808 is a wasteful number, since it uses less digits than its factorization.

1321103808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99762 (or 99749 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1321103808 is about 36346.9917324667. The cubic root of 1321103808 is about 1097.2669916278.

The spelling of 1321103808 in words is "one billion, three hundred twenty-one million, one hundred three thousand, eight hundred eight".