10221002020021 has 8 divisors (see below), whose sum is σ = 11016277524504. Its totient is φ = 9427018598400.

The previous prime is 10221002019931. The next prime is 10221002020027. The reversal of 10221002020021 is 12002020012201.

It is a happy number.

10221002020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15948153796 + 10205053866225 = 126286^2 + 3194535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10221002020021 - 2¹⁵ = 10221001987253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221002019983 and 10221002020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221002020027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323004280 + ... + 323035921.

It is an arithmetic number, because the mean of its divisors is an integer number (1377034690563).

Almost surely, 2^{10221002020021} is an apocalyptic number.

It is an amenable number.

10221002020021 is a deficient number, since it is larger than the sum of its proper divisors (795275504483).

10221002020021 is a wasteful number, since it uses less digits than its factorization.

10221002020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646041431.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10221002020021 its reverse (12002020012201), we get a palindrome (22223022032222).

The spelling of 10221002020021 in words is "ten trillion, two hundred twenty-one billion, two million, twenty thousand, twenty-one".