2003121123 has 4 divisors (see below), whose sum is σ = 2670828168. Its totient is φ = 1335414080.

The previous prime is 2003121121. The next prime is 2003121137. The reversal of 2003121123 is 3211213002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2003121123 - 2¹ = 2003121121 is a prime.

It is a super-2 number, since 2×2003121123² = 8024988466817562258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2003121121) 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 3 ways as a sum of consecutive naturals, for example, 333853518 + ... + 333853523.

It is an arithmetic number, because the mean of its divisors is an integer number (667707042).

Almost surely, 2^2003121123 is an apocalyptic number.

2003121123 is a deficient number, since it is larger than the sum of its proper divisors (667707045).

2003121123 is an equidigital number, since it uses as much as digits as its factorization.

2003121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667707044.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2003121123 is about 44756.2411625463. The cubic root of 2003121123 is about 1260.5761040234.

Adding to 2003121123 its reverse (3211213002), we get a palindrome (5214334125).

The spelling of 2003121123 in words is "two billion, three million, one hundred twenty-one thousand, one hundred twenty-three".