201121200100043 has 2 divisors, whose sum is σ = 201121200100044. Its totient is φ = 201121200100042.

The previous prime is 201121200100013. The next prime is 201121200100141. The reversal of 201121200100043 is 340001002121102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201121200100043 - 2¹⁶ = 201121200034507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201121200099994 and 201121200100030.

It is not a weakly prime, because it can be changed into another prime (201121200100013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560600050021 + 100560600050022.

It is an arithmetic number, because the mean of its divisors is an integer number (100560600050022).

Almost surely, 2^{201121200100043} is an apocalyptic number.

201121200100043 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121200100043 is an equidigital number, since it uses as much as digits as its factorization.

201121200100043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201121200100043 its reverse (340001002121102), we get a palindrome (541122202221145).

The spelling of 201121200100043 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred million, one hundred thousand, forty-three".