21000000001013 has 8 divisors (see below), whose sum is σ = 23297380587360. Its totient is φ = 18767334360880.

The previous prime is 21000000001003. The next prime is 21000000001027. The reversal of 21000000001013 is 31010000000012.

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

It is a cyclic number.

It is not a de Polignac number, because 21000000001013 - 2⁸ = 21000000000757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000000001003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16178735870 + ... + 16178737167.

It is an arithmetic number, because the mean of its divisors is an integer number (2912172573420).

Almost surely, 2^{21000000001013} is an apocalyptic number.

It is an amenable number.

21000000001013 is a deficient number, since it is larger than the sum of its proper divisors (2297380586347).

21000000001013 is a wasteful number, since it uses less digits than its factorization.

21000000001013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32357473107.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21000000001013 its reverse (31010000000012), we get a palindrome (52010000001025).

The spelling of 21000000001013 in words is "twenty-one trillion, one thousand, thirteen".