10202122001221 has 4 divisors (see below), whose sum is σ = 10202239530700. Its totient is φ = 10202004471744.

The previous prime is 10202122001173. The next prime is 10202122001233. The reversal of 10202122001221 is 12210022120201.

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 3905465250625 + 6296656750596 = 1976225^2 + 2509314^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202122001221 - 2¹⁹ = 10202121476933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202122001195 and 10202122001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202122001821) 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, 58634436 + ... + 58808173.

It is an arithmetic number, because the mean of its divisors is an integer number (2550559882675).

Almost surely, 2^{10202122001221} is an apocalyptic number.

It is an amenable number.

10202122001221 is a deficient number, since it is larger than the sum of its proper divisors (117529479).

10202122001221 is an equidigital number, since it uses as much as digits as its factorization.

10202122001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117529478.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10202122001221 its reverse (12210022120201), we get a palindrome (22412144121422).

The spelling of 10202122001221 in words is "ten trillion, two hundred two billion, one hundred twenty-two million, one thousand, two hundred twenty-one".