21101310013 has 8 divisors (see below), whose sum is σ = 24120980928. Its totient is φ = 18082938624.

The previous prime is 21101310011. The next prime is 21101310017. The reversal of 21101310013 is 31001310112.

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 21101310013 - 2¹ = 21101310011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101309975 and 21101310002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101310011) 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, 289831 + ... + 355252.

It is an arithmetic number, because the mean of its divisors is an integer number (3015122616).

Almost surely, 2^21101310013 is an apocalyptic number.

It is an amenable number.

21101310013 is a deficient number, since it is larger than the sum of its proper divisors (3019670915).

21101310013 is an equidigital number, since it uses as much as digits as its factorization.

21101310013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649763.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21101310013 its reverse (31001310112), we get a palindrome (52102620125).

Subtracting 21101310013 from its reverse (31001310112), we obtain a palindrome (9900000099).

The spelling of 21101310013 in words is "twenty-one billion, one hundred one million, three hundred ten thousand, thirteen".