201112421 has 4 divisors (see below), whose sum is σ = 206017644. Its totient is φ = 196207200.

The previous prime is 201112411. The next prime is 201112441. The reversal of 201112421 is 124211102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124211102 = 2 ⋅62105551.

It can be written as a sum of positive squares in 2 ways, for example, as 56776225 + 144336196 = 7535^2 + 12014^2 .

It is a cyclic number.

It is not a de Polignac number, because 201112421 - 2¹⁰ = 201111397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201112396 and 201112405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2452550 + ... + 2452631.

It is an arithmetic number, because the mean of its divisors is an integer number (51504411).

Almost surely, 2^201112421 is an apocalyptic number.

It is an amenable number.

201112421 is a deficient number, since it is larger than the sum of its proper divisors (4905223).

201112421 is an equidigital number, since it uses as much as digits as its factorization.

201112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905222.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 201112421 is about 14181.4111075027. The cubic root of 201112421 is about 585.8857898463.

Adding to 201112421 its reverse (124211102), we get a palindrome (325323523).

The spelling of 201112421 in words is "two hundred one million, one hundred twelve thousand, four hundred twenty-one".