10200021022021 has 4 divisors (see below), whose sum is σ = 10201058357292. Its totient is φ = 10198983686752.

The previous prime is 10200021022003. The next prime is 10200021022063. The reversal of 10200021022021 is 12022012000201.

It is a happy number.

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 7550190513121 + 2649830508900 = 2747761^2 + 1627830^2 .

It is a cyclic number.

It is not a de Polignac number, because 10200021022021 - 2⁵ = 10200021021989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10200021021992 and 10200021022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200021023021) 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, 518652886 + ... + 518672551.

It is an arithmetic number, because the mean of its divisors is an integer number (2550264589323).

Almost surely, 2^{10200021022021} is an apocalyptic number.

It is an amenable number.

10200021022021 is a deficient number, since it is larger than the sum of its proper divisors (1037335271).

10200021022021 is an equidigital number, since it uses as much as digits as its factorization.

10200021022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037335270.

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

Adding to 10200021022021 its reverse (12022012000201), we get a palindrome (22222033022222).

The spelling of 10200021022021 in words is "ten trillion, two hundred billion, twenty-one million, twenty-two thousand, twenty-one".