20200121204203 has 2 divisors, whose sum is σ = 20200121204204. Its totient is φ = 20200121204202.

The previous prime is 20200121204183. The next prime is 20200121204231. The reversal of 20200121204203 is 30240212100202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200121204203 - 2²⁵ = 20200087649771 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200121208203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100060602101 + 10100060602102.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060602102).

Almost surely, 2^{20200121204203} is an apocalyptic number.

20200121204203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200121204203 is an equidigital number, since it uses as much as digits as its factorization.

20200121204203 is an evil number, because the sum of its binary digits is even.

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

Adding to 20200121204203 its reverse (30240212100202), we get a palindrome (50440333304405).

The spelling of 20200121204203 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred four thousand, two hundred three".