10213220221 has 4 divisors (see below), whose sum is σ = 10255953600. Its totient is φ = 10170486844.

The previous prime is 10213220209. The next prime is 10213220243. The reversal of 10213220221 is 12202231201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10213220221 - 2⁵ = 10213220189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10213220195 and 10213220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10213220021) 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, 21366331 + ... + 21366808.

It is an arithmetic number, because the mean of its divisors is an integer number (2563988400).

Almost surely, 2^10213220221 is an apocalyptic number.

It is an amenable number.

10213220221 is a deficient number, since it is larger than the sum of its proper divisors (42733379).

10213220221 is an equidigital number, since it uses as much as digits as its factorization.

10213220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42733378.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 10213220221 its reverse (12202231201), we get a palindrome (22415451422).

The spelling of 10213220221 in words is "ten billion, two hundred thirteen million, two hundred twenty thousand, two hundred twenty-one".