22103122561 has 4 divisors (see below), whose sum is σ = 23803362772. Its totient is φ = 20402882352.

The previous prime is 22103122553. The next prime is 22103122603. The reversal of 22103122561 is 16522130122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12852530161 + 9250592400 = 113369^2 + 96180^2 .

It is a cyclic number.

It is not a de Polignac number, because 22103122561 - 2³ = 22103122553 is a prime.

It is a super-3 number, since 3×22103122561³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22103122501) 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, 850120086 + ... + 850120111.

It is an arithmetic number, because the mean of its divisors is an integer number (5950840693).

Almost surely, 2^22103122561 is an apocalyptic number.

It is an amenable number.

22103122561 is a deficient number, since it is larger than the sum of its proper divisors (1700240211).

22103122561 is a wasteful number, since it uses less digits than its factorization.

22103122561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700240210.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 22103122561 its reverse (16522130122), we get a palindrome (38625252683).

The spelling of 22103122561 in words is "twenty-two billion, one hundred three million, one hundred twenty-two thousand, five hundred sixty-one".