2003121007 has 2 divisors, whose sum is σ = 2003121008. Its totient is φ = 2003121006.

The previous prime is 2003120983. The next prime is 2003121049. The reversal of 2003121007 is 7001213002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003121007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003122007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001560503 + 1001560504.

It is an arithmetic number, because the mean of its divisors is an integer number (1001560504).

Almost surely, 2^2003121007 is an apocalyptic number.

2003121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003121007 is an equidigital number, since it uses as much as digits as its factorization.

2003121007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2003121007 is about 44756.2398666376. The cubic root of 2003121007 is about 1260.5760796902.

Adding to 2003121007 its reverse (7001213002), we get a palindrome (9004334009).

The spelling of 2003121007 in words is "two billion, three million, one hundred twenty-one thousand, seven".