21001110513 has 8 divisors (see below), whose sum is σ = 28113041376. Its totient is φ = 13944960000.

The previous prime is 21001110511. The next prime is 21001110539. The reversal of 21001110513 is 31501110012.

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

It is not a de Polignac number, because 21001110513 - 2¹ = 21001110511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21001110492 and 21001110501.

It is not an unprimeable number, because it can be changed into a prime (21001110511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13944208 + ... + 13945713.

It is an arithmetic number, because the mean of its divisors is an integer number (3514130172).

Almost surely, 2^21001110513 is an apocalyptic number.

It is an amenable number.

21001110513 is a deficient number, since it is larger than the sum of its proper divisors (7111930863).

21001110513 is a wasteful number, since it uses less digits than its factorization.

21001110513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27890175.

The product of its (nonzero) digits is 30, while the sum is 15.

Adding to 21001110513 its reverse (31501110012), we get a palindrome (52502220525).

The spelling of 21001110513 in words is "twenty-one billion, one million, one hundred ten thousand, five hundred thirteen".