10221220221 has 8 divisors (see below), whose sum is σ = 14345572320. Its totient is φ = 6455507472.

The previous prime is 10221220213. The next prime is 10221220291. The reversal of 10221220221 is 12202212201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10221220221 - 2³ = 10221220213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10221220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221220291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89659770 + ... + 89659883.

It is an arithmetic number, because the mean of its divisors is an integer number (1793196540).

Almost surely, 2^10221220221 is an apocalyptic number.

It is an amenable number.

10221220221 is a deficient number, since it is larger than the sum of its proper divisors (4124352099).

10221220221 is a wasteful number, since it uses less digits than its factorization.

10221220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179319675.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 10221220221 its reverse (12202212201), we get a palindrome (22423432422).

The spelling of 10221220221 in words is "ten billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".