2003011121 has 4 divisors (see below), whose sum is σ = 2072080500. Its totient is φ = 1933941744.

The previous prime is 2003011117. The next prime is 2003011133. The reversal of 2003011121 is 1211103002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 359519521 + 1643491600 = 18961^2 + 40540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003011121 - 2² = 2003011117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2003011721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34534646 + ... + 34534703.

It is an arithmetic number, because the mean of its divisors is an integer number (518020125).

Almost surely, 2^2003011121 is an apocalyptic number.

It is an amenable number.

2003011121 is a deficient number, since it is larger than the sum of its proper divisors (69069379).

2003011121 is an equidigital number, since it uses as much as digits as its factorization.

2003011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69069378.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2003011121 is about 44755.0122444403. The cubic root of 2003011121 is about 1260.5530286288.

Adding to 2003011121 its reverse (1211103002), we get a palindrome (3214114123).

The spelling of 2003011121 in words is "two billion, three million, eleven thousand, one hundred twenty-one".