2003122021 has 8 divisors (see below), whose sum is σ = 2080379160. Its totient is φ = 1927081728.

The previous prime is 2003122007. The next prime is 2003122027. The reversal of 2003122021 is 1202213002.

It can be written as a sum of positive squares in 4 ways, for example, as 204089796 + 1799032225 = 14286^2 + 42415^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2003122021 - 2⁷ = 2003121893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003121992 and 2003122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003122027) 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 7 ways as a sum of consecutive naturals, for example, 300856 + ... + 307441.

It is an arithmetic number, because the mean of its divisors is an integer number (260047395).

Almost surely, 2^2003122021 is an apocalyptic number.

It is an amenable number.

2003122021 is a deficient number, since it is larger than the sum of its proper divisors (77257139).

2003122021 is an equidigital number, since it uses as much as digits as its factorization.

2003122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608423.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2003122021 is about 44756.2511946655. The cubic root of 2003122021 is about 1260.5762923956.

Adding to 2003122021 its reverse (1202213002), we get a palindrome (3205335023).

The spelling of 2003122021 in words is "two billion, three million, one hundred twenty-two thousand, twenty-one".