20200120221181 has 2 divisors, whose sum is σ = 20200120221182. Its totient is φ = 20200120221180.

The previous prime is 20200120221103. The next prime is 20200120221233. The reversal of 20200120221181 is 18112202100202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13415444544100 + 6784675677081 = 3662710^2 + 2604741^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200120221181 - 2¹¹ = 20200120219133 is a prime.

It is a super-2 number, since 2×20200120221181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200120222181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100060110590 + 10100060110591.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060110591).

Almost surely, 2^{20200120221181} is an apocalyptic number.

It is an amenable number.

20200120221181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200120221181 is an equidigital number, since it uses as much as digits as its factorization.

20200120221181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 20200120221181 its reverse (18112202100202), we get a palindrome (38312322321383).

The spelling of 20200120221181 in words is "twenty trillion, two hundred billion, one hundred twenty million, two hundred twenty-one thousand, one hundred eighty-one".