22201210021 has 4 divisors (see below), whose sum is σ = 22201747200. Its totient is φ = 22200672844.

The previous prime is 22201210013. The next prime is 22201210033. The reversal of 22201210021 is 12001210222.

It is a happy number.

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: 12001210222 = 2 ⋅6000605111.

It is a cyclic number.

It is not a de Polignac number, because 22201210021 - 2³ = 22201210013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201209983 and 22201210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201210081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200911 + ... + 291148.

It is an arithmetic number, because the mean of its divisors is an integer number (5550436800).

Almost surely, 2^22201210021 is an apocalyptic number.

It is an amenable number.

22201210021 is a deficient number, since it is larger than the sum of its proper divisors (537179).

22201210021 is an equidigital number, since it uses as much as digits as its factorization.

22201210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537178.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22201210021 its reverse (12001210222), we get a palindrome (34202420243).

The spelling of 22201210021 in words is "twenty-two billion, two hundred one million, two hundred ten thousand, twenty-one".