222101012221 has 24 divisors (see below), whose sum is σ = 258198542784. Its totient is φ = 189425701440.

The previous prime is 222101012213. The next prime is 222101012317. The reversal of 222101012221 is 122210101222.

It is a happy number.

It is not a de Polignac number, because 222101012221 - 2³ = 222101012213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222101012195 and 222101012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137505 + ... + 680521.

It is an arithmetic number, because the mean of its divisors is an integer number (10758272616).

Almost surely, 2^222101012221 is an apocalyptic number.

It is an amenable number.

222101012221 is a deficient number, since it is larger than the sum of its proper divisors (36097530563).

222101012221 is a wasteful number, since it uses less digits than its factorization.

222101012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543169 (or 543150 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222101012221 its reverse (122210101222), we get a palindrome (344311113443).

The spelling of 222101012221 in words is "two hundred twenty-two billion, one hundred one million, twelve thousand, two hundred twenty-one".