1321110340 has 48 divisors (see below), whose sum is σ = 3158144640. Its totient is φ = 459514880.

The previous prime is 1321110331. The next prime is 1321110347. The reversal of 1321110340 is 430111231.

It is not an unprimeable number, because it can be changed into a prime (1321110347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125485 + ... + 135604.

It is an arithmetic number, because the mean of its divisors is an integer number (65794680).

Almost surely, 2^1321110340 is an apocalyptic number.

1321110340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321110340 is an abundant number, since it is smaller than the sum of its proper divisors (1837034300).

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

1321110340 is a wasteful number, since it uses less digits than its factorization.

1321110340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261132 (or 261130 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321110340 is about 36347.0815884852. The cubic root of 1321110340 is about 1097.2688000490.

Adding to 1321110340 its reverse (430111231), we get a palindrome (1751221571).

The spelling of 1321110340 in words is "one billion, three hundred twenty-one million, one hundred ten thousand, three hundred forty".