21000113003 has 8 divisors (see below), whose sum is σ = 21497306688. Its totient is φ = 20503320264.

The previous prime is 21000112981. The next prime is 21000113023. The reversal of 21000113003 is 30031100012.

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 21000113003 - 2²⁶ = 20933004139 is a prime.

It is a super-2 number, since 2×21000113003² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000113023) 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 7 ways as a sum of consecutive naturals, for example, 7100 + ... + 205062.

It is an arithmetic number, because the mean of its divisors is an integer number (2687163336).

Almost surely, 2^21000113003 is an apocalyptic number.

21000113003 is a deficient number, since it is larger than the sum of its proper divisors (497193685).

21000113003 is a wasteful number, since it uses less digits than its factorization.

21000113003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200473.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 21000113003 its reverse (30031100012), we get a palindrome (51031213015).

The spelling of 21000113003 in words is "twenty-one billion, one hundred thirteen thousand, three".