1321440011 has 8 divisors (see below), whose sum is σ = 1344216048. Its totient is φ = 1298700000.

The previous prime is 1321439969. The next prime is 1321440023. The reversal of 1321440011 is 1100441231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321440011 - 2⁶ = 1321439947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321440041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71036 + ... + 87686.

It is an arithmetic number, because the mean of its divisors is an integer number (168027006).

Almost surely, 2^1321440011 is an apocalyptic number.

1321440011 is a deficient number, since it is larger than the sum of its proper divisors (22776037).

1321440011 is a wasteful number, since it uses less digits than its factorization.

1321440011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18013.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1321440011 is about 36351.6163464570. The cubic root of 1321440011 is about 1097.3600635885.

Adding to 1321440011 its reverse (1100441231), we get a palindrome (2421881242).

The spelling of 1321440011 in words is "one billion, three hundred twenty-one million, four hundred forty thousand, eleven".