22102222120021 has 4 divisors (see below), whose sum is σ = 22114590460992. Its totient is φ = 22089853779052.

The previous prime is 22102222120019. The next prime is 22102222120039. The reversal of 22102222120021 is 12002122220122.

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 22102222120021 - 2¹ = 22102222120019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102222120081) 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, 6184167805 + ... + 6184171378.

It is an arithmetic number, because the mean of its divisors is an integer number (5528647615248).

Almost surely, 2^{22102222120021} is an apocalyptic number.

It is an amenable number.

22102222120021 is a deficient number, since it is larger than the sum of its proper divisors (12368340971).

22102222120021 is a wasteful number, since it uses less digits than its factorization.

22102222120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12368340970.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22102222120021 its reverse (12002122220122), we get a palindrome (34104344340143).

The spelling of 22102222120021 in words is "twenty-two trillion, one hundred two billion, two hundred twenty-two million, one hundred twenty thousand, twenty-one".