1321100368 has 30 divisors (see below), whose sum is σ = 2977532826. Its totient is φ = 566185536.

The previous prime is 1321100303. The next prime is 1321100399. The reversal of 1321100368 is 8630011231.

It can be written as a sum of positive squares in only one way, i.e., 1272491584 + 48608784 = 35672^2 + 6972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 841755 + ... + 843322.

Almost surely, 2^1321100368 is an apocalyptic number.

It is an amenable number.

1321100368 is an abundant number, since it is smaller than the sum of its proper divisors (1656432458).

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

1321100368 is a wasteful number, since it uses less digits than its factorization.

1321100368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685099 (or 1685086 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1321100368 is about 36346.9444107754. The cubic root of 1321100368 is about 1097.2660392420.

Adding to 1321100368 its reverse (8630011231), we get a palindrome (9951111599).

The spelling of 1321100368 in words is "one billion, three hundred twenty-one million, one hundred thousand, three hundred sixty-eight".