22103112221 has 4 divisors (see below), whose sum is σ = 22103559744. Its totient is φ = 22102664700.

The previous prime is 22103112211. The next prime is 22103112223. The reversal of 22103112221 is 12221130122.

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 a de Polignac number, because none of the positive numbers 2^k-22103112221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22103112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22103112223) 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, 138965 + ... + 252026.

It is an arithmetic number, because the mean of its divisors is an integer number (5525889936).

Almost surely, 2^22103112221 is an apocalyptic number.

It is an amenable number.

22103112221 is a deficient number, since it is larger than the sum of its proper divisors (447523).

22103112221 is an equidigital number, since it uses as much as digits as its factorization.

22103112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447522.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22103112221 its reverse (12221130122), we get a palindrome (34324242343).

The spelling of 22103112221 in words is "twenty-two billion, one hundred three million, one hundred twelve thousand, two hundred twenty-one".