22241454721 has 4 divisors (see below), whose sum is σ = 22257020500. Its totient is φ = 22225888944.

The previous prime is 22241454709. The next prime is 22241454749. The reversal of 22241454721 is 12745414222.

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 6425625600 + 15815829121 = 80160^2 + 125761^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241454721 - 2¹⁹ = 22240930433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22241454761) 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, 7780746 + ... + 7783603.

It is an arithmetic number, because the mean of its divisors is an integer number (5564255125).

Almost surely, 2^22241454721 is an apocalyptic number.

It is an amenable number.

22241454721 is a deficient number, since it is larger than the sum of its proper divisors (15565779).

22241454721 is a wasteful number, since it uses less digits than its factorization.

22241454721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15565778.

The product of its digits is 35840, while the sum is 34.

Adding to 22241454721 its reverse (12745414222), we get a palindrome (34986868943).

The spelling of 22241454721 in words is "twenty-two billion, two hundred forty-one million, four hundred fifty-four thousand, seven hundred twenty-one".