21000032130113 has 4 divisors (see below), whose sum is σ = 21567600566100. Its totient is φ = 20432463694128.

The previous prime is 21000032130059. The next prime is 21000032130127. The reversal of 21000032130113 is 31103123000012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7219662685249 + 13780369444864 = 2686943^2 + 3712192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000032130113 is a prime.

It is a super-2 number, since 2×21000032130113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000032130091 and 21000032130100.

It is not an unprimeable number, because it can be changed into a prime (21000032130163) 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, 283784217938 + ... + 283784218011.

It is an arithmetic number, because the mean of its divisors is an integer number (5391900141525).

Almost surely, 2^{21000032130113} is an apocalyptic number.

It is an amenable number.

21000032130113 is a deficient number, since it is larger than the sum of its proper divisors (567568435987).

21000032130113 is an equidigital number, since it uses as much as digits as its factorization.

21000032130113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567568435986.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21000032130113 its reverse (31103123000012), we get a palindrome (52103155130125).

The spelling of 21000032130113 in words is "twenty-one trillion, thirty-two million, one hundred thirty thousand, one hundred thirteen".