20200121120143 has 2 divisors, whose sum is σ = 20200121120144. Its totient is φ = 20200121120142.

The previous prime is 20200121120089. The next prime is 20200121120171. The reversal of 20200121120143 is 34102112100202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20200121120143 - 2⁹ = 20200121119631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200121120143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200121120743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100060560071 + 10100060560072.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060560072).

Almost surely, 2^{20200121120143} is an apocalyptic number.

20200121120143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200121120143 is an equidigital number, since it uses as much as digits as its factorization.

20200121120143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20200121120143 its reverse (34102112100202), we get a palindrome (54302233220345).

The spelling of 20200121120143 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, one hundred twenty thousand, one hundred forty-three".