22011220321 has 4 divisors (see below), whose sum is σ = 22156990144. Its totient is φ = 21865450500.

The previous prime is 22011220307. The next prime is 22011220331. The reversal of 22011220321 is 12302211022.

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 22011220321 - 2¹⁹ = 22010696033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011220295 and 22011220304.

It is not an unprimeable number, because it can be changed into a prime (22011220331) 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, 72884685 + ... + 72884986.

It is an arithmetic number, because the mean of its divisors is an integer number (5539247536).

Almost surely, 2^22011220321 is an apocalyptic number.

It is an amenable number.

22011220321 is a deficient number, since it is larger than the sum of its proper divisors (145769823).

22011220321 is a wasteful number, since it uses less digits than its factorization.

22011220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145769822.

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

Adding to 22011220321 its reverse (12302211022), we get a palindrome (34313431343).

The spelling of 22011220321 in words is "twenty-two billion, eleven million, two hundred twenty thousand, three hundred twenty-one".