10202122202221 has 4 divisors (see below), whose sum is σ = 10238952968572. Its totient is φ = 10165291435872.

The previous prime is 10202122202219. The next prime is 10202122202227. The reversal of 10202122202221 is 12220222120201.

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 1096755602121 + 9105366600100 = 1047261^2 + 3017510^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202122202221 - 2¹ = 10202122202219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202122202227) 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, 18415382760 + ... + 18415383313.

It is an arithmetic number, because the mean of its divisors is an integer number (2559738242143).

Almost surely, 2^{10202122202221} is an apocalyptic number.

It is an amenable number.

10202122202221 is a deficient number, since it is larger than the sum of its proper divisors (36830766351).

10202122202221 is an equidigital number, since it uses as much as digits as its factorization.

10202122202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36830766350.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 10202122202221 its reverse (12220222120201), we get a palindrome (22422344322422).

The spelling of 10202122202221 in words is "ten trillion, two hundred two billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".