21020430201 has 16 divisors (see below), whose sum is σ = 28388609280. Its totient is φ = 13833452160.

The previous prime is 21020430199. The next prime is 21020430217. The reversal of 21020430201 is 10203402012.

It is not a de Polignac number, because 21020430201 - 2¹ = 21020430199 is a prime.

It is a super-2 number, since 2×21020430201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21020430271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99456 + ... + 227886.

It is an arithmetic number, because the mean of its divisors is an integer number (1774288080).

Almost surely, 2^21020430201 is an apocalyptic number.

It is an amenable number.

21020430201 is a deficient number, since it is larger than the sum of its proper divisors (7368179079).

21020430201 is a wasteful number, since it uses less digits than its factorization.

21020430201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129136.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21020430201 its reverse (10203402012), we get a palindrome (31223832213).

The spelling of 21020430201 in words is "twenty-one billion, twenty million, four hundred thirty thousand, two hundred one".