201123210443 has 4 divisors (see below), whose sum is σ = 201156301440. Its totient is φ = 201090119448.

The previous prime is 201123210439. The next prime is 201123210461. The reversal of 201123210443 is 344012321102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344012321102 = 2 ⋅172006160551.

It is a cyclic number.

It is not a de Polignac number, because 201123210443 - 2² = 201123210439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201123110443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16536380 + ... + 16548537.

It is an arithmetic number, because the mean of its divisors is an integer number (50289075360).

Almost surely, 2^201123210443 is an apocalyptic number.

201123210443 is a deficient number, since it is larger than the sum of its proper divisors (33090997).

201123210443 is an equidigital number, since it uses as much as digits as its factorization.

201123210443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33090996.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 201123210443 its reverse (344012321102), we get a palindrome (545135531545).

The spelling of 201123210443 in words is "two hundred one billion, one hundred twenty-three million, two hundred ten thousand, four hundred forty-three".