2111000021 has 8 divisors (see below), whose sum is σ = 2307316704. Its totient is φ = 1919530800.

The previous prime is 2111000009. The next prime is 2111000029. The reversal of 2111000021 is 1200001112.

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 2111000021 - 2¹⁰ = 2110998997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2110999972 and 2111000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111000029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210955 + ... + 1212696.

It is an arithmetic number, because the mean of its divisors is an integer number (288414588).

Almost surely, 2^2111000021 is an apocalyptic number.

It is an amenable number.

2111000021 is a deficient number, since it is larger than the sum of its proper divisors (196316683).

2111000021 is a wasteful number, since it uses less digits than its factorization.

2111000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423731.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2111000021 is about 45945.6202591716. The cubic root of 2111000021 is about 1282.8112084299.

Adding to 2111000021 its reverse (1200001112), we get a palindrome (3311001133).

The spelling of 2111000021 in words is "two billion, one hundred eleven million, twenty-one", and thus it is an aban number.