10222222221 has 16 divisors (see below), whose sum is σ = 15293977920. Its totient is φ = 6747339600.

The previous prime is 10222222211. The next prime is 10222222223. The reversal of 10222222221 is 12222222201.

10222222221 is a `hidden beast` number, since 1 + 0 + 222 + 222 + 221 = 666.

10222222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10222222221 - 2¹⁰ = 10222221197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10222222194 and 10222222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10222222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1871535 + ... + 1876988.

It is an arithmetic number, because the mean of its divisors is an integer number (955873620).

Almost surely, 2^10222222221 is an apocalyptic number.

It is an amenable number.

10222222221 is a deficient number, since it is larger than the sum of its proper divisors (5071755699).

10222222221 is a wasteful number, since it uses less digits than its factorization.

10222222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748633 (or 3748627 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 10222222221 its reverse (12222222201), we get a palindrome (22444444422).

The spelling of 10222222221 in words is "ten billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".