22222201011221 has 8 divisors (see below), whose sum is σ = 22419812754240. Its totient is φ = 22024606024512.

The previous prime is 22222201011139. The next prime is 22222201011281. The reversal of 22222201011221 is 12211010222222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22222201011221 - 2²⁶ = 22222133902357 is a prime.

It is a super-2 number, since 2×22222201011221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22222201011193 and 22222201011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222201011281) 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 7 ways as a sum of consecutive naturals, for example, 1517345 + ... + 6837158.

It is an arithmetic number, because the mean of its divisors is an integer number (2802476594280).

Almost surely, 2^{22222201011221} is an apocalyptic number.

It is an amenable number.

22222201011221 is a deficient number, since it is larger than the sum of its proper divisors (197611743019).

22222201011221 is a wasteful number, since it uses less digits than its factorization.

22222201011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8378155.

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

Adding to 22222201011221 its reverse (12211010222222), we get a palindrome (34433211233443).

The spelling of 22222201011221 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred one million, eleven thousand, two hundred twenty-one".