10203010021 has 4 divisors (see below), whose sum is σ = 10203266700. Its totient is φ = 10202753344.

The previous prime is 10203009991. The next prime is 10203010043. The reversal of 10203010021 is 12001030201.

10203010021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 9030700900 + 1172309121 = 95030^2 + 34239^2 .

It is a cyclic number.

It is not a de Polignac number, because 10203010021 - 2¹³ = 10203001829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203010721) 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, 54586 + ... + 152923.

It is an arithmetic number, because the mean of its divisors is an integer number (2550816675).

Almost surely, 2^10203010021 is an apocalyptic number.

It is an amenable number.

10203010021 is a deficient number, since it is larger than the sum of its proper divisors (256679).

10203010021 is an equidigital number, since it uses as much as digits as its factorization.

10203010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256678.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10203010021 its reverse (12001030201), we get a palindrome (22204040222).

The spelling of 10203010021 in words is "ten billion, two hundred three million, ten thousand, twenty-one".