22222111020221 has 4 divisors (see below), whose sum is σ = 25396698308832. Its totient is φ = 19047523731612.

The previous prime is 22222111020209. The next prime is 22222111020233. The reversal of 22222111020221 is 12202011122222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (22222111020209) and next prime (22222111020233).

It is a cyclic number.

It is not a de Polignac number, because 22222111020221 - 2¹⁰ = 22222111019197 is a prime.

It is a super-2 number, since 2×22222111020221² (a number of 27 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 = 22222111020193 and 22222111020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222111820221) 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 3 ways as a sum of consecutive naturals, for example, 1587293644295 + ... + 1587293644308.

It is an arithmetic number, because the mean of its divisors is an integer number (6349174577208).

Almost surely, 2^{22222111020221} is an apocalyptic number.

It is an amenable number.

22222111020221 is a deficient number, since it is larger than the sum of its proper divisors (3174587288611).

22222111020221 is an equidigital number, since it uses as much as digits as its factorization.

22222111020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174587288610.

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

Adding to 22222111020221 its reverse (12202011122222), we get a palindrome (34424122142443).

The spelling of 22222111020221 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred eleven million, twenty thousand, two hundred twenty-one".