20220021220121 has 2 divisors, whose sum is σ = 20220021220122. Its totient is φ = 20220021220120.

The previous prime is 20220021220081. The next prime is 20220021220123. The reversal of 20220021220121 is 12102212002202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20200179680521 + 19841539600 = 4494461^2 + 140860^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220021220121 - 2¹⁴ = 20220021203737 is a prime.

Together with 20220021220123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20220021220121.

It is not a weakly prime, because it can be changed into another prime (20220021220123) 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 as a sum of consecutive naturals, namely, 10110010610060 + 10110010610061.

It is an arithmetic number, because the mean of its divisors is an integer number (10110010610061).

Almost surely, 2^{20220021220121} is an apocalyptic number.

It is an amenable number.

20220021220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220021220121 is an equidigital number, since it uses as much as digits as its factorization.

20220021220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20220021220121 its reverse (12102212002202), we get a palindrome (32322233222323).

The spelling of 20220021220121 in words is "twenty trillion, two hundred twenty billion, twenty-one million, two hundred twenty thousand, one hundred twenty-one".