22211221202021 has 16 divisors (see below), whose sum is σ = 22711772270208. Its totient is φ = 21715085620800.

The previous prime is 22211221202011. The next prime is 22211221202029. The reversal of 22211221202021 is 12020212211222.

It is a cyclic number.

It is not a de Polignac number, because 22211221202021 - 2³⁸ = 21936343295077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211221201984 and 22211221202002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211221202029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227029511 + ... + 227127323.

It is an arithmetic number, because the mean of its divisors is an integer number (1419485766888).

Almost surely, 2^{22211221202021} is an apocalyptic number.

It is an amenable number.

22211221202021 is a deficient number, since it is larger than the sum of its proper divisors (500551068187).

22211221202021 is a wasteful number, since it uses less digits than its factorization.

22211221202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120332.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22211221202021 its reverse (12020212211222), we get a palindrome (34231433413243).

The spelling of 22211221202021 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred two thousand, twenty-one".