20200000120081 has 2 divisors, whose sum is σ = 20200000120082. Its totient is φ = 20200000120080.

The previous prime is 20200000120073. The next prime is 20200000120151. The reversal of 20200000120081 is 18002100000202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17788318464400 + 2411681655681 = 4217620^2 + 1552959^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200000120081 - 2³ = 20200000120073 is a prime.

It is a super-2 number, since 2×20200000120081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20200000120031) 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, 10100000060040 + 10100000060041.

It is an arithmetic number, because the mean of its divisors is an integer number (10100000060041).

Almost surely, 2^{20200000120081} is an apocalyptic number.

It is an amenable number.

20200000120081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200000120081 is an equidigital number, since it uses as much as digits as its factorization.

20200000120081 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 20200000120081 its reverse (18002100000202), we get a palindrome (38202100120283).

The spelling of 20200000120081 in words is "twenty trillion, two hundred billion, one hundred twenty thousand, eighty-one".