21120130013 has 8 divisors (see below), whose sum is σ = 22363811640. Its totient is φ = 19876595200.

The previous prime is 21120129973. The next prime is 21120130069. The reversal of 21120130013 is 31003102112.

It can be written as a sum of positive squares in 4 ways, for example, as 8151020089 + 12969109924 = 90283^2 + 113882^2 .

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 21120130013 - 2²⁴ = 21103352797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21120130013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120130613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426863 + ... + 473763.

It is an arithmetic number, because the mean of its divisors is an integer number (2795476455).

Almost surely, 2^21120130013 is an apocalyptic number.

It is an amenable number.

21120130013 is a deficient number, since it is larger than the sum of its proper divisors (1243681627).

21120130013 is a wasteful number, since it uses less digits than its factorization.

21120130013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73407.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21120130013 its reverse (31003102112), we get a palindrome (52123232125).

The spelling of 21120130013 in words is "twenty-one billion, one hundred twenty million, one hundred thirty thousand, thirteen".