21333201001 has 24 divisors (see below), whose sum is σ = 25155294720. Its totient is φ = 18036188352.

The previous prime is 21333200989. The next prime is 21333201011. The reversal of 21333201001 is 10010233312.

It is not a de Polignac number, because 21333201001 - 2¹⁹ = 21332676713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333201011) 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 23 ways as a sum of consecutive naturals, for example, 5134741 + ... + 5138893.

It is an arithmetic number, because the mean of its divisors is an integer number (1048137280).

Almost surely, 2^21333201001 is an apocalyptic number.

It is an amenable number.

21333201001 is a deficient number, since it is larger than the sum of its proper divisors (3822093719).

21333201001 is a wasteful number, since it uses less digits than its factorization.

21333201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21333201001 its reverse (10010233312), we get a palindrome (31343434313).

The spelling of 21333201001 in words is "twenty-one billion, three hundred thirty-three million, two hundred one thousand, one".