10222515221 has 4 divisors (see below), whose sum is σ = 10222824492. Its totient is φ = 10222205952.

The previous prime is 10222515203. The next prime is 10222515227. The reversal of 10222515221 is 12251522201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12251522201 = 6703 ⋅1827767.

It can be written as a sum of positive squares in 2 ways, for example, as 7425268900 + 2797246321 = 86170^2 + 52889^2 .

It is a cyclic number.

It is not a de Polignac number, because 10222515221 - 2²⁶ = 10155406357 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 (10222515227) 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, 98186 + ... + 173451.

It is an arithmetic number, because the mean of its divisors is an integer number (2555706123).

Almost surely, 2^10222515221 is an apocalyptic number.

It is an amenable number.

10222515221 is a deficient number, since it is larger than the sum of its proper divisors (309271).

10222515221 is an equidigital number, since it uses as much as digits as its factorization.

10222515221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309270.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 10222515221 in words is "ten billion, two hundred twenty-two million, five hundred fifteen thousand, two hundred twenty-one".