2121504001 has 8 divisors (see below), whose sum is σ = 2294092800. Its totient is φ = 1954225728.

The previous prime is 2121503983. The next prime is 2121504023. The reversal of 2121504001 is 1004051212.

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 2121504001 - 2¹⁹ = 2120979713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121504031) 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, 1326801 + ... + 1328398.

It is an arithmetic number, because the mean of its divisors is an integer number (286761600).

Almost surely, 2^2121504001 is an apocalyptic number.

It is an amenable number.

2121504001 is a deficient number, since it is larger than the sum of its proper divisors (172588799).

2121504001 is a wasteful number, since it uses less digits than its factorization.

2121504001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655263.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2121504001 is about 46059.7872444066. The cubic root of 2121504001 is about 1284.9353732127.

Adding to 2121504001 its reverse (1004051212), we get a palindrome (3125555213).

The spelling of 2121504001 in words is "two billion, one hundred twenty-one million, five hundred four thousand, one".