2123021003 has 16 divisors (see below), whose sum is σ = 2260022016. Its totient is φ = 1989995040.

The previous prime is 2123020997. The next prime is 2123021029. The reversal of 2123021003 is 3001203212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2123021003 - 2¹⁰ = 2123019979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123021063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394376 + ... + 399722.

It is an arithmetic number, because the mean of its divisors is an integer number (141251376).

Almost surely, 2^2123021003 is an apocalyptic number.

2123021003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2123021003 is a deficient number, since it is larger than the sum of its proper divisors (137001013).

2123021003 is a wasteful number, since it uses less digits than its factorization.

2123021003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2123021003 is about 46076.2520502699. The cubic root of 2123021003 is about 1285.2415687395.

Adding to 2123021003 its reverse (3001203212), we get a palindrome (5124224215).

The spelling of 2123021003 in words is "two billion, one hundred twenty-three million, twenty-one thousand, three".