20221231021021 has 2 divisors, whose sum is σ = 20221231021022. Its totient is φ = 20221231021020.

The previous prime is 20221231021003. The next prime is 20221231021027. The reversal of 20221231021021 is 12012013212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17915419140921 + 2305811880100 = 4232661^2 + 1518490^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221231021021 - 2⁵ = 20221231020989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20221231021021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221231021027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110615510510 + 10110615510511.

It is an arithmetic number, because the mean of its divisors is an integer number (10110615510511).

Almost surely, 2^{20221231021021} is an apocalyptic number.

It is an amenable number.

20221231021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221231021021 is an equidigital number, since it uses as much as digits as its factorization.

20221231021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20221231021021 its reverse (12012013212202), we get a palindrome (32233244233223).

The spelling of 20221231021021 in words is "twenty trillion, two hundred twenty-one billion, two hundred thirty-one million, twenty-one thousand, twenty-one".