2121012003 has 16 divisors (see below), whose sum is σ = 3086658432. Its totient is φ = 1284816000.

The previous prime is 2121011927. The next prime is 2121012031. The reversal of 2121012003 is 3002101212.

It is not a de Polignac number, because 2121012003 - 2⁸ = 2121011747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121012003.

It is not an unprimeable number, because it can be changed into a prime (2121012043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55243 + ... + 85403.

It is an arithmetic number, because the mean of its divisors is an integer number (192916152).

Almost surely, 2^2121012003 is an apocalyptic number.

2121012003 is a deficient number, since it is larger than the sum of its proper divisors (965646429).

2121012003 is a wasteful number, since it uses less digits than its factorization.

2121012003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32306.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2121012003 is about 46054.4460720135. The cubic root of 2121012003 is about 1284.8360357443.

Adding to 2121012003 its reverse (3002101212), we get a palindrome (5123113215).

The spelling of 2121012003 in words is "two billion, one hundred twenty-one million, twelve thousand, three".