202112200020121 has 2 divisors, whose sum is σ = 202112200020122. Its totient is φ = 202112200020120.

The previous prime is 202112200020089. The next prime is 202112200020217. The reversal of 202112200020121 is 121020002211202.

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., 174959878017600 + 27152322002521 = 13227240^2 + 5210789^2 .

It is a cyclic number.

It is not a de Polignac number, because 202112200020121 - 2⁵ = 202112200020089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202112200020095 and 202112200020104.

It is not a weakly prime, because it can be changed into another prime (202112200020721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101056100010060 + 101056100010061.

It is an arithmetic number, because the mean of its divisors is an integer number (101056100010061).

Almost surely, 2^{202112200020121} is an apocalyptic number.

It is an amenable number.

202112200020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202112200020121 is an equidigital number, since it uses as much as digits as its factorization.

202112200020121 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 202112200020121 its reverse (121020002211202), we get a palindrome (323132202231323).

The spelling of 202112200020121 in words is "two hundred two trillion, one hundred twelve billion, two hundred million, twenty thousand, one hundred twenty-one".