201044430421 has 4 divisors (see below), whose sum is σ = 204451963200. Its totient is φ = 197636897644.

The previous prime is 201044430407. The next prime is 201044430427. The reversal of 201044430421 is 124034440102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124034440102 = 2 ⋅62017220051.

It is a cyclic number.

It is not a de Polignac number, because 201044430421 - 2⁹ = 201044429909 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 (201044430427) 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, 1703766301 + ... + 1703766418.

It is an arithmetic number, because the mean of its divisors is an integer number (51112990800).

Almost surely, 2^201044430421 is an apocalyptic number.

It is an amenable number.

201044430421 is a deficient number, since it is larger than the sum of its proper divisors (3407532779).

201044430421 is an equidigital number, since it uses as much as digits as its factorization.

201044430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407532778.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 201044430421 its reverse (124034440102), we get a palindrome (325078870523).

The spelling of 201044430421 in words is "two hundred one billion, forty-four million, four hundred thirty thousand, four hundred twenty-one".