10010202021 has 24 divisors (see below), whose sum is σ = 15876753984. Its totient is φ = 6280908480.

The previous prime is 10010202001. The next prime is 10010202047. The reversal of 10010202021 is 12020201001.

It is not a de Polignac number, because 10010202021 - 2¹⁰ = 10010200997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10010201994 and 10010202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010202001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1207465 + ... + 1215726.

It is an arithmetic number, because the mean of its divisors is an integer number (661531416).

Almost surely, 2^10010202021 is an apocalyptic number.

It is an amenable number.

10010202021 is a deficient number, since it is larger than the sum of its proper divisors (5866551963).

10010202021 is an equidigital number, since it uses as much as digits as its factorization.

10010202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423223 (or 2423211 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10010202021 its reverse (12020201001), we get a palindrome (22030403022).

The spelling of 10010202021 in words is "ten billion, ten million, two hundred two thousand, twenty-one".