10202021000001 has 24 divisors (see below), whose sum is σ = 15607759115520. Its totient is φ = 6399352930176.

The previous prime is 10202020999999. The next prime is 10202021000033. The reversal of 10202021000001 is 10000012020201.

It is not a de Polignac number, because 10202021000001 - 2¹ = 10202020999999 is a prime.

It is a super-2 number, since 2×10202021000001² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (10202021000201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9461581 + ... + 10484538.

It is an arithmetic number, because the mean of its divisors is an integer number (650323296480).

Almost surely, 2^{10202021000001} is an apocalyptic number.

It is an amenable number.

10202021000001 is a deficient number, since it is larger than the sum of its proper divisors (5405738115519).

10202021000001 is a wasteful number, since it uses less digits than its factorization.

10202021000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19949485 (or 19949482 counting only the distinct ones).

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

Adding to 10202021000001 its reverse (10000012020201), we get a palindrome (20202033020202).

The spelling of 10202021000001 in words is "ten trillion, two hundred two billion, twenty-one million, one", and thus it is an aban number.