20122021012021 has 2 divisors, whose sum is σ = 20122021012022. Its totient is φ = 20122021012020.

The previous prime is 20122021012001. The next prime is 20122021012039. The reversal of 20122021012021 is 12021012022102.

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., 19911353781796 + 210667230225 = 4462214^2 + 458985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122021012021 - 2¹⁵ = 20122020979253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122021011986 and 20122021012004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122021012001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061010506010 + 10061010506011.

It is an arithmetic number, because the mean of its divisors is an integer number (10061010506011).

Almost surely, 2^{20122021012021} is an apocalyptic number.

It is an amenable number.

20122021012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122021012021 is an equidigital number, since it uses as much as digits as its factorization.

20122021012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20122021012021 its reverse (12021012022102), we get a palindrome (32143033034123).

The spelling of 20122021012021 in words is "twenty trillion, one hundred twenty-two billion, twenty-one million, twelve thousand, twenty-one".