22121130021 has 4 divisors (see below), whose sum is σ = 29494840032. Its totient is φ = 14747420012.

The previous prime is 22121130001. The next prime is 22121130029. The reversal of 22121130021 is 12003112122.

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 not a de Polignac number, because 22121130021 - 2⁹ = 22121129509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121130029) 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, 3686855001 + ... + 3686855006.

It is an arithmetic number, because the mean of its divisors is an integer number (7373710008).

Almost surely, 2^22121130021 is an apocalyptic number.

It is an amenable number.

22121130021 is a deficient number, since it is larger than the sum of its proper divisors (7373710011).

22121130021 is an equidigital number, since it uses as much as digits as its factorization.

22121130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373710010.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22121130021 its reverse (12003112122), we get a palindrome (34124242143).

The spelling of 22121130021 in words is "twenty-two billion, one hundred twenty-one million, one hundred thirty thousand, twenty-one".