2107066021 has 4 divisors (see below), whose sum is σ = 2179723500. Its totient is φ = 2034408544.

The previous prime is 2107066019. The next prime is 2107066043. The reversal of 2107066021 is 1206607012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1263802500 + 843263521 = 35550^2 + 29039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2107066021 - 2¹ = 2107066019 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 (2107066081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36328696 + ... + 36328753.

It is an arithmetic number, because the mean of its divisors is an integer number (544930875).

Almost surely, 2^2107066021 is an apocalyptic number.

It is an amenable number.

2107066021 is a deficient number, since it is larger than the sum of its proper divisors (72657479).

2107066021 is an equidigital number, since it uses as much as digits as its factorization.

2107066021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72657478.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2107066021 is about 45902.7888150600. The cubic root of 2107066021 is about 1282.0138426663.

The spelling of 2107066021 in words is "two billion, one hundred seven million, sixty-six thousand, twenty-one".