21304011001 has 40 divisors (see below), whose sum is σ = 27238804544. Its totient is φ = 16225513920.

The previous prime is 21304010953. The next prime is 21304011007. The reversal of 21304011001 is 10011040312.

It is not a de Polignac number, because 21304011001 - 2⁹ = 21304010489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (21304011007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 64362406 + ... + 64362736.

Almost surely, 2^21304011001 is an apocalyptic number.

It is an amenable number.

21304011001 is a deficient number, since it is larger than the sum of its proper divisors (5934793543).

21304011001 is an frugal number, since it uses more digits than its factorization.

21304011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21304011001 its reverse (10011040312), we get a palindrome (31315051313).

The spelling of 21304011001 in words is "twenty-one billion, three hundred four million, eleven thousand, one".