10202220221 has 4 divisors (see below), whose sum is σ = 10739179200. Its totient is φ = 9665261244.

The previous prime is 10202220173. The next prime is 10202220227. The reversal of 10202220221 is 12202220201.

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 a de Polignac number, because none of the positive numbers 2^k-10202220221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202220196 and 10202220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202220227) 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, 268479461 + ... + 268479498.

It is an arithmetic number, because the mean of its divisors is an integer number (2684794800).

Almost surely, 2^10202220221 is an apocalyptic number.

It is an amenable number.

10202220221 is a deficient number, since it is larger than the sum of its proper divisors (536958979).

10202220221 is an equidigital number, since it uses as much as digits as its factorization.

10202220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536958978.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 10202220221 its reverse (12202220201), we get a palindrome (22404440422).

The spelling of 10202220221 in words is "ten billion, two hundred two million, two hundred twenty thousand, two hundred twenty-one".