20200121220043 has 2 divisors, whose sum is σ = 20200121220044. Its totient is φ = 20200121220042.

The previous prime is 20200121219969. The next prime is 20200121220061. The reversal of 20200121220043 is 34002212100202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20200121220043 - 2¹⁷ = 20200121088971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200121220043.

It is not a weakly prime, because it can be changed into another prime (20200121220443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100060610021 + 10100060610022.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060610022).

Almost surely, 2^{20200121220043} is an apocalyptic number.

20200121220043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200121220043 is an equidigital number, since it uses as much as digits as its factorization.

20200121220043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20200121220043 its reverse (34002212100202), we get a palindrome (54202333320245).

The spelling of 20200121220043 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twenty thousand, forty-three".