22111221120221 has 4 divisors (see below), whose sum is σ = 22270294653600. Its totient is φ = 21952147586844.

The previous prime is 22111221120217. The next prime is 22111221120239. The reversal of 22111221120221 is 12202112211122.

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 a cyclic number.

It is not a de Polignac number, because 22111221120221 - 2² = 22111221120217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111221120193 and 22111221120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111221120281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79536766481 + ... + 79536766758.

It is an arithmetic number, because the mean of its divisors is an integer number (5567573663400).

Almost surely, 2^{22111221120221} is an apocalyptic number.

It is an amenable number.

22111221120221 is a deficient number, since it is larger than the sum of its proper divisors (159073533379).

22111221120221 is a wasteful number, since it uses less digits than its factorization.

22111221120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159073533378.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22111221120221 its reverse (12202112211122), we get a palindrome (34313333331343).

The spelling of 22111221120221 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".