21530050201 has 8 divisors (see below), whose sum is σ = 23572122624. Its totient is φ = 19502110320.

The previous prime is 21530050189. The next prime is 21530050237. The reversal of 21530050201 is 10205003512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21530050201 - 2¹⁷ = 21529919129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21530050271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529945 + ... + 3536038.

It is an arithmetic number, because the mean of its divisors is an integer number (2946515328).

Almost surely, 2^21530050201 is an apocalyptic number.

It is an amenable number.

21530050201 is a deficient number, since it is larger than the sum of its proper divisors (2042072423).

21530050201 is a wasteful number, since it uses less digits than its factorization.

21530050201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066271.

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 21530050201 its reverse (10205003512), we get a palindrome (31735053713).

The spelling of 21530050201 in words is "twenty-one billion, five hundred thirty million, fifty thousand, two hundred one".