201421020133 has 4 divisors (see below), whose sum is σ = 201450470188. Its totient is φ = 201391570080.

The previous prime is 201421020121. The next prime is 201421020139. The reversal of 201421020133 is 331020124102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103065397444 + 98355622689 = 321038^2 + 313617^2 .

It is a cyclic number.

It is not a de Polignac number, because 201421020133 - 2¹³ = 201421011941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201421020133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201421020139) 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, 14714766 + ... + 14728447.

It is an arithmetic number, because the mean of its divisors is an integer number (50362617547).

Almost surely, 2^201421020133 is an apocalyptic number.

It is an amenable number.

201421020133 is a deficient number, since it is larger than the sum of its proper divisors (29450055).

201421020133 is an equidigital number, since it uses as much as digits as its factorization.

201421020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29450054.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201421020133 its reverse (331020124102), we get a palindrome (532441144235).

The spelling of 201421020133 in words is "two hundred one billion, four hundred twenty-one million, twenty thousand, one hundred thirty-three".