2103002021 has 2 divisors, whose sum is σ = 2103002022. Its totient is φ = 2103002020.

The previous prime is 2103001997. The next prime is 2103002059. The reversal of 2103002021 is 1202003012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1427781796 + 675220225 = 37786^2 + 25985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2103002021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2103001993 and 2103002011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103002071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051501010 + 1051501011.

It is an arithmetic number, because the mean of its divisors is an integer number (1051501011).

Almost surely, 2^2103002021 is an apocalyptic number.

It is an amenable number.

2103002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103002021 is an equidigital number, since it uses as much as digits as its factorization.

2103002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2103002021 is about 45858.4999863711. The cubic root of 2103002021 is about 1281.1890848501.

Adding to 2103002021 its reverse (1202003012), we get a palindrome (3305005033).

Subtracting from 2103002021 its reverse (1202003012), we obtain a palindrome (900999009).

The spelling of 2103002021 in words is "two billion, one hundred three million, two thousand, twenty-one".