222021102021221 has 24 divisors (see below), whose sum is σ = 233261161109760. Its totient is φ = 211302431436096.

The previous prime is 222021102021163. The next prime is 222021102021227. The reversal of 222021102021221 is 122120201120222.

It is not a de Polignac number, because 222021102021221 - 2¹⁴ = 222021102004837 is a prime.

It is a super-2 number, since 2×222021102021221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222021102021193 and 222021102021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222021102021227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89344940 + ... + 91796298.

It is an arithmetic number, because the mean of its divisors is an integer number (9719215046240).

Almost surely, 2^{222021102021221} is an apocalyptic number.

It is an amenable number.

222021102021221 is a deficient number, since it is larger than the sum of its proper divisors (11240059088539).

222021102021221 is a wasteful number, since it uses less digits than its factorization.

222021102021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452265 (or 2452242 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222021102021221 its reverse (122120201120222), we get a palindrome (344141303141443).

Subtracting from 222021102021221 its reverse (122120201120222), we obtain a palindrome (99900900900999).

The spelling of 222021102021221 in words is "two hundred twenty-two trillion, twenty-one billion, one hundred two million, twenty-one thousand, two hundred twenty-one".