21003340601 has 8 divisors (see below), whose sum is σ = 22119148800. Its totient is φ = 19888569360.

The previous prime is 21003340571. The next prime is 21003340663. The reversal of 21003340601 is 10604330012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21003340601 is a prime.

It is a super-2 number, since 2×21003340601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003340301) 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 7 ways as a sum of consecutive naturals, for example, 217481 + ... + 298838.

It is an arithmetic number, because the mean of its divisors is an integer number (2764893600).

Almost surely, 2^21003340601 is an apocalyptic number.

It is an amenable number.

21003340601 is a deficient number, since it is larger than the sum of its proper divisors (1115808199).

21003340601 is a wasteful number, since it uses less digits than its factorization.

21003340601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518479.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21003340601 its reverse (10604330012), we get a palindrome (31607670613).

The spelling of 21003340601 in words is "twenty-one billion, three million, three hundred forty thousand, six hundred one".