21003102113 has 24 divisors (see below), whose sum is σ = 26547736320. Its totient is φ = 16504961760.

The previous prime is 21003102053. The next prime is 21003102157. The reversal of 21003102113 is 31120130012.

It is not a de Polignac number, because 21003102113 - 2⁶ = 21003102049 is a prime.

It is a super-2 number, since 2×21003102113² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21003102163) 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 23 ways as a sum of consecutive naturals, for example, 335006 + ... + 392727.

It is an arithmetic number, because the mean of its divisors is an integer number (1106155680).

Almost surely, 2^21003102113 is an apocalyptic number.

It is an amenable number.

21003102113 is a deficient number, since it is larger than the sum of its proper divisors (5544634207).

21003102113 is a wasteful number, since it uses less digits than its factorization.

21003102113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727797 (or 727790 counting only the distinct ones).

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

Adding to 21003102113 its reverse (31120130012), we get a palindrome (52123232125).

The spelling of 21003102113 in words is "twenty-one billion, three million, one hundred two thousand, one hundred thirteen".