22056220661 has 4 divisors (see below), whose sum is σ = 23217074400. Its totient is φ = 20895366924.

The previous prime is 22056220649. The next prime is 22056220663. The reversal of 22056220661 is 16602265022.

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 22056220661 - 2¹⁰ = 22056219637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056220663) 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, 580426841 + ... + 580426878.

It is an arithmetic number, because the mean of its divisors is an integer number (5804268600).

Almost surely, 2^22056220661 is an apocalyptic number.

It is an amenable number.

22056220661 is a deficient number, since it is larger than the sum of its proper divisors (1160853739).

22056220661 is a wasteful number, since it uses less digits than its factorization.

22056220661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160853738.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 22056220661 its reverse (16602265022), we get a palindrome (38658485683).

The spelling of 22056220661 in words is "twenty-two billion, fifty-six million, two hundred twenty thousand, six hundred sixty-one".