20201220100043 has 2 divisors, whose sum is σ = 20201220100044. Its totient is φ = 20201220100042.

The previous prime is 20201220099971. The next prime is 20201220100057. The reversal of 20201220100043 is 34000102210202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20201220100043 - 2⁴⁴ = 2609034055627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201220099994 and 20201220100030.

It is not a weakly prime, because it can be changed into another prime (20201220100073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100610050021 + 10100610050022.

It is an arithmetic number, because the mean of its divisors is an integer number (10100610050022).

Almost surely, 2^{20201220100043} is an apocalyptic number.

20201220100043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201220100043 is an equidigital number, since it uses as much as digits as its factorization.

20201220100043 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 17.

Adding to 20201220100043 its reverse (34000102210202), we get a palindrome (54201322310245).

The spelling of 20201220100043 in words is "twenty trillion, two hundred one billion, two hundred twenty million, one hundred thousand, forty-three".