2111110021 has 8 divisors (see below), whose sum is σ = 2147463000. Its totient is φ = 2074813440.

The previous prime is 2111110019. The next prime is 2111110033. The reversal of 2111110021 is 1200111112.

It can be written as a sum of positive squares in 4 ways, for example, as 41860900 + 2069249121 = 6470^2 + 45489^2 .

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 2111110021 - 2¹ = 2111110019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111110061) 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, 65205 + ... + 92053.

It is an arithmetic number, because the mean of its divisors is an integer number (268432875).

Almost surely, 2^2111110021 is an apocalyptic number.

It is an amenable number.

2111110021 is a deficient number, since it is larger than the sum of its proper divisors (36352979).

2111110021 is a wasteful number, since it uses less digits than its factorization.

2111110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28199.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2111110021 is about 45946.8173108867. The cubic root of 2111110021 is about 1282.8334896206.

Adding to 2111110021 its reverse (1200111112), we get a palindrome (3311221133).

The spelling of 2111110021 in words is "two billion, one hundred eleven million, one hundred ten thousand, twenty-one".