201134100421 has 4 divisors (see below), whose sum is σ = 202012415500. Its totient is φ = 200255785344.

The previous prime is 201134100413. The next prime is 201134100439. The reversal of 201134100421 is 124001431102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124001431102 = 2 ⋅62000715551.

It can be written as a sum of positive squares in 2 ways, for example, as 164097097921 + 37037002500 = 405089^2 + 192450^2 .

It is a cyclic number.

It is not a de Polignac number, because 201134100421 - 2³ = 201134100413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201134100121) 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, 439157196 + ... + 439157653.

It is an arithmetic number, because the mean of its divisors is an integer number (50503103875).

Almost surely, 2^201134100421 is an apocalyptic number.

It is an amenable number.

201134100421 is a deficient number, since it is larger than the sum of its proper divisors (878315079).

201134100421 is an equidigital number, since it uses as much as digits as its factorization.

201134100421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878315078.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 201134100421 its reverse (124001431102), we get a palindrome (325135531523).

The spelling of 201134100421 in words is "two hundred one billion, one hundred thirty-four million, one hundred thousand, four hundred twenty-one".