1321400011 has 8 divisors (see below), whose sum is σ = 1391569920. Its totient is φ = 1251292392.

The previous prime is 1321399967. The next prime is 1321400023. The reversal of 1321400011 is 1100041231.

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 1321400011 - 2²⁹ = 784529099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321399964 and 1321400000.

It is not an unprimeable number, because it can be changed into a prime (1322400011) 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, 31686 + ... + 60388.

It is an arithmetic number, because the mean of its divisors is an integer number (173946240).

Almost surely, 2^1321400011 is an apocalyptic number.

1321400011 is a deficient number, since it is larger than the sum of its proper divisors (70169909).

1321400011 is a wasteful number, since it uses less digits than its factorization.

1321400011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31145.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1321400011 is about 36351.0661604306. The cubic root of 1321400011 is about 1097.3489911108.

Adding to 1321400011 its reverse (1100041231), we get a palindrome (2421441242).

The spelling of 1321400011 in words is "one billion, three hundred twenty-one million, four hundred thousand, eleven".