21131030013 has 8 divisors (see below), whose sum is σ = 28332108000. Its totient is φ = 14008652688.

The previous prime is 21131029991. The next prime is 21131030027. The reversal of 21131030013 is 31003013112.

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

It is not a de Polignac number, because 21131030013 - 2¹⁸ = 21130767869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21131029974 and 21131030001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131030813) 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, 19674538 + ... + 19675611.

It is an arithmetic number, because the mean of its divisors is an integer number (3541513500).

Almost surely, 2^21131030013 is an apocalyptic number.

It is an amenable number.

21131030013 is a deficient number, since it is larger than the sum of its proper divisors (7201077987).

21131030013 is a wasteful number, since it uses less digits than its factorization.

21131030013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39350331.

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

Adding to 21131030013 its reverse (31003013112), we get a palindrome (52134043125).

The spelling of 21131030013 in words is "twenty-one billion, one hundred thirty-one million, thirty thousand, thirteen".