20121321001 has 8 divisors (see below), whose sum is σ = 21122438400. Its totient is φ = 19142206320.

The previous prime is 20121320983. The next prime is 20121321013. The reversal of 20121321001 is 10012312102.

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 20121321001 - 2²⁷ = 19987103273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121321041) 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, 5498806 + ... + 5502463.

It is an arithmetic number, because the mean of its divisors is an integer number (2640304800).

Almost surely, 2^20121321001 is an apocalyptic number.

It is an amenable number.

20121321001 is a deficient number, since it is larger than the sum of its proper divisors (1001117399).

20121321001 is a wasteful number, since it uses less digits than its factorization.

20121321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001359.

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

Adding to 20121321001 its reverse (10012312102), we get a palindrome (30133633103).

The spelling of 20121321001 in words is "twenty billion, one hundred twenty-one million, three hundred twenty-one thousand, one".