10202201200021 has 4 divisors (see below), whose sum is σ = 10203552671500. Its totient is φ = 10200849728544.

The previous prime is 10202201200007. The next prime is 10202201200073. The reversal of 10202201200021 is 12000210220201.

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 6856484643121 + 3345716556900 = 2618489^2 + 1829130^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202201200021 - 2¹⁷ = 10202201068949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202201199974 and 10202201200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202201200621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675724416 + ... + 675739513.

It is an arithmetic number, because the mean of its divisors is an integer number (2550888167875).

Almost surely, 2^{10202201200021} is an apocalyptic number.

It is an amenable number.

10202201200021 is a deficient number, since it is larger than the sum of its proper divisors (1351471479).

10202201200021 is an equidigital number, since it uses as much as digits as its factorization.

10202201200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351471478.

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

Adding to 10202201200021 its reverse (12000210220201), we get a palindrome (22202411420222).

The spelling of 10202201200021 in words is "ten trillion, two hundred two billion, two hundred one million, two hundred thousand, twenty-one".