10220221221 has 16 divisors (see below), whose sum is σ = 15585719424. Its totient is φ = 5835608064.

The previous prime is 10220221183. The next prime is 10220221229. The reversal of 10220221221 is 12212202201.

10220221221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10220221221 - 2⁶ = 10220221157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10220221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220221229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160380 + ... + 214853.

It is an arithmetic number, because the mean of its divisors is an integer number (974107464).

Almost surely, 2^10220221221 is an apocalyptic number.

It is an amenable number.

10220221221 is a deficient number, since it is larger than the sum of its proper divisors (5365498203).

10220221221 is a wasteful number, since it uses less digits than its factorization.

10220221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376540.

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

Adding to 10220221221 its reverse (12212202201), we get a palindrome (22432423422).

The spelling of 10220221221 in words is "ten billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".