21013130013 has 8 divisors (see below), whose sum is σ = 28289521728. Its totient is φ = 13872745824.

The previous prime is 21013129987. The next prime is 21013130023. The reversal of 21013130013 is 31003131012.

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

It is not a de Polignac number, because 21013130013 - 2²² = 21008935709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21013129974 and 21013130001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013130023) 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, 34001520 + ... + 34002137.

It is an arithmetic number, because the mean of its divisors is an integer number (3536190216).

Almost surely, 2^21013130013 is an apocalyptic number.

It is an amenable number.

21013130013 is a deficient number, since it is larger than the sum of its proper divisors (7276391715).

21013130013 is a wasteful number, since it uses less digits than its factorization.

21013130013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68003763.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21013130013 its reverse (31003131012), we get a palindrome (52016261025).

Subtracting 21013130013 from its reverse (31003131012), we obtain a palindrome (9990000999).

The spelling of 21013130013 in words is "twenty-one billion, thirteen million, one hundred thirty thousand, thirteen".