2222021101221 has 16 divisors (see below), whose sum is σ = 3309118110720. Its totient is φ = 1473591651840.

The previous prime is 2222021101219. The next prime is 2222021101249. The reversal of 2222021101221 is 1221011202222.

It is a happy number.

It is not a de Polignac number, because 2222021101221 - 2¹ = 2222021101219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2222021101194 and 2222021101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222021101621) 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 15 ways as a sum of consecutive naturals, for example, 215432220 + ... + 215442533.

It is an arithmetic number, because the mean of its divisors is an integer number (206819881920).

Almost surely, 2^{2222021101221} is an apocalyptic number.

It is an amenable number.

2222021101221 is a deficient number, since it is larger than the sum of its proper divisors (1087097009499).

2222021101221 is a wasteful number, since it uses less digits than its factorization.

2222021101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430874953 (or 430874947 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2222021101221 its reverse (1221011202222), we get a palindrome (3443032303443).

The spelling of 2222021101221 in words is "two trillion, two hundred twenty-two billion, twenty-one million, one hundred one thousand, two hundred twenty-one".