20220211221221 has 16 divisors (see below), whose sum is σ = 22118359835328. Its totient is φ = 18332112844800.

The previous prime is 20220211221187. The next prime is 20220211221239. The reversal of 20220211221221 is 12212211202202.

It is a cyclic number.

It is not a de Polignac number, because 20220211221221 - 2⁴² = 15822164710117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220211221193 and 20220211221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220211221281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5388050 + ... + 8334956.

It is an arithmetic number, because the mean of its divisors is an integer number (1382397489708).

Almost surely, 2^{20220211221221} is an apocalyptic number.

It is an amenable number.

20220211221221 is a deficient number, since it is larger than the sum of its proper divisors (1898148614107).

20220211221221 is a wasteful number, since it uses less digits than its factorization.

20220211221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948612.

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

Adding to 20220211221221 its reverse (12212211202202), we get a palindrome (32432422423423).

The spelling of 20220211221221 in words is "twenty trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".