20200121120089 has 2 divisors, whose sum is σ = 20200121120090. Its totient is φ = 20200121120088.

The previous prime is 20200121120029. The next prime is 20200121120143. The reversal of 20200121120089 is 98002112100202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14168637015625 + 6031484104464 = 3764125^2 + 2455908^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200121120089 - 2¹³ = 20200121111897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200121120029) 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, 10100060560044 + 10100060560045.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060560045).

Almost surely, 2^{20200121120089} is an apocalyptic number.

It is an amenable number.

20200121120089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200121120089 is an equidigital number, since it uses as much as digits as its factorization.

20200121120089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 20200121120089 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, one hundred twenty thousand, eighty-nine".