2121044403 has 8 divisors (see below), whose sum is σ = 2828552400. Its totient is φ = 1413783008.

The previous prime is 2121044363. The next prime is 2121044447. The reversal of 2121044403 is 3044401212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121044403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121044403.

It is not an unprimeable number, because it can be changed into a prime (2121044483) 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, 40548 + ... + 76721.

It is an arithmetic number, because the mean of its divisors is an integer number (353569050).

Almost surely, 2^2121044403 is an apocalyptic number.

2121044403 is a deficient number, since it is larger than the sum of its proper divisors (707507997).

2121044403 is a wasteful number, since it uses less digits than its factorization.

2121044403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123301.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2121044403 is about 46054.7978282394. The cubic root of 2121044403 is about 1284.8425779791.

Adding to 2121044403 its reverse (3044401212), we get a palindrome (5165445615).

The spelling of 2121044403 in words is "two billion, one hundred twenty-one million, forty-four thousand, four hundred three".