21021333201 has 24 divisors (see below), whose sum is σ = 33172570080. Its totient is φ = 12721723200.

The previous prime is 21021333173. The next prime is 21021333233. The reversal of 21021333201 is 10233312012.

21021333201 is a `hidden beast` number, since 210 + 2 + 133 + 320 + 1 = 666.

It is not a de Polignac number, because 21021333201 - 2¹³ = 21021325009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021333241) 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 23 ways as a sum of consecutive naturals, for example, 85236 + ... + 222053.

It is an arithmetic number, because the mean of its divisors is an integer number (1382190420).

Almost surely, 2^21021333201 is an apocalyptic number.

It is an amenable number.

21021333201 is a deficient number, since it is larger than the sum of its proper divisors (12151236879).

21021333201 is a wasteful number, since it uses less digits than its factorization.

21021333201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307997 (or 307994 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21021333201 its reverse (10233312012), we get a palindrome (31254645213).

The spelling of 21021333201 in words is "twenty-one billion, twenty-one million, three hundred thirty-three thousand, two hundred one".