22121224001 has 4 divisors (see below), whose sum is σ = 22834811904. Its totient is φ = 21407636100.

The previous prime is 22121223959. The next prime is 22121224019. The reversal of 22121224001 is 10042212122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10042212122 = 2 ⋅5021106061.

It is a cyclic number.

It is not a de Polignac number, because 22121224001 - 2⁶ = 22121223937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121224061) 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, 356793905 + ... + 356793966.

It is an arithmetic number, because the mean of its divisors is an integer number (5708702976).

Almost surely, 2^22121224001 is an apocalyptic number.

It is an amenable number.

22121224001 is a deficient number, since it is larger than the sum of its proper divisors (713587903).

22121224001 is an equidigital number, since it uses as much as digits as its factorization.

22121224001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713587902.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22121224001 its reverse (10042212122), we get a palindrome (32163436123).

The spelling of 22121224001 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-four thousand, one".