21131410013 has 4 divisors (see below), whose sum is σ = 24150182880. Its totient is φ = 18112637148.

The previous prime is 21131410009. The next prime is 21131410073. The reversal of 21131410013 is 31001413112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21131410013 - 2² = 21131410009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131409973 and 21131410000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131410073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509386423 + ... + 1509386436.

It is an arithmetic number, because the mean of its divisors is an integer number (6037545720).

Almost surely, 2^21131410013 is an apocalyptic number.

It is an amenable number.

21131410013 is a deficient number, since it is larger than the sum of its proper divisors (3018772867).

21131410013 is an equidigital number, since it uses as much as digits as its factorization.

21131410013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018772866.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21131410013 its reverse (31001413112), we get a palindrome (52132823125).

The spelling of 21131410013 in words is "twenty-one billion, one hundred thirty-one million, four hundred ten thousand, thirteen".