22124120021 has 4 divisors (see below), whose sum is σ = 22837801344. Its totient is φ = 21410438700.

The previous prime is 22124119987. The next prime is 22124120041. The reversal of 22124120021 is 12002142122.

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-22124120021 is a prime.

It is a super-2 number, since 2×22124120021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22124120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356840615 + ... + 356840676.

It is an arithmetic number, because the mean of its divisors is an integer number (5709450336).

Almost surely, 2^22124120021 is an apocalyptic number.

It is an amenable number.

22124120021 is a deficient number, since it is larger than the sum of its proper divisors (713681323).

22124120021 is an equidigital number, since it uses as much as digits as its factorization.

22124120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713681322.

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

Adding to 22124120021 its reverse (12002142122), we get a palindrome (34126262143).

The spelling of 22124120021 in words is "twenty-two billion, one hundred twenty-four million, one hundred twenty thousand, twenty-one".