2113000021 has 16 divisors (see below), whose sum is σ = 2396620800. Its totient is φ = 1845529200.

The previous prime is 2113000003. The next prime is 2113000027. The reversal of 2113000021 is 1200003112.

It is not a de Polignac number, because 2113000021 - 2¹⁵ = 2112967253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112999971 and 2113000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113000027) 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 15 ways as a sum of consecutive naturals, for example, 25110 + ... + 69688.

It is an arithmetic number, because the mean of its divisors is an integer number (149788800).

Almost surely, 2^2113000021 is an apocalyptic number.

It is an amenable number.

2113000021 is a deficient number, since it is larger than the sum of its proper divisors (283620779).

2113000021 is a wasteful number, since it uses less digits than its factorization.

2113000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44760.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2113000021 is about 45967.3799666677. The cubic root of 2113000021 is about 1283.2162001524.

Adding to 2113000021 its reverse (1200003112), we get a palindrome (3313003133).

The spelling of 2113000021 in words is "two billion, one hundred thirteen million, twenty-one", and thus it is an aban number.