20202112012021 has 2 divisors, whose sum is σ = 20202112012022. Its totient is φ = 20202112012020.

The previous prime is 20202112012009. The next prime is 20202112012039. The reversal of 20202112012021 is 12021021120202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18565283475025 + 1636828536996 = 4308745^2 + 1279386^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202112012021 - 2¹¹ = 20202112009973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202112011986 and 20202112012004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202112012721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101056006010 + 10101056006011.

It is an arithmetic number, because the mean of its divisors is an integer number (10101056006011).

Almost surely, 2^{20202112012021} is an apocalyptic number.

It is an amenable number.

20202112012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202112012021 is an equidigital number, since it uses as much as digits as its factorization.

20202112012021 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 20202112012021 its reverse (12021021120202), we get a palindrome (32223133132223).

The spelling of 20202112012021 in words is "twenty trillion, two hundred two billion, one hundred twelve million, twelve thousand, twenty-one".