22011320221 has 4 divisors (see below), whose sum is σ = 24012349344. Its totient is φ = 20010291100.

The previous prime is 22011320209. The next prime is 22011320263. The reversal of 22011320221 is 12202311022.

It is a happy number.

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 22011320221 - 2²¹ = 22009223069 is a prime.

It is a super-3 number, since 3×22011320221³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011320195 and 22011320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011320021) 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, 1000514545 + ... + 1000514566.

It is an arithmetic number, because the mean of its divisors is an integer number (6003087336).

Almost surely, 2^22011320221 is an apocalyptic number.

It is an amenable number.

22011320221 is a deficient number, since it is larger than the sum of its proper divisors (2001029123).

22011320221 is a wasteful number, since it uses less digits than its factorization.

22011320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001029122.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22011320221 its reverse (12202311022), we get a palindrome (34213631243).

The spelling of 22011320221 in words is "twenty-two billion, eleven million, three hundred twenty thousand, two hundred twenty-one".