2112665377 has 4 divisors (see below), whose sum is σ = 2121891220. Its totient is φ = 2103439536.

The previous prime is 2112665371. The next prime is 2112665393. The reversal of 2112665377 is 7735662112.

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 1879309201 + 233356176 = 43351^2 + 15276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112665377 - 2⁷ = 2112665249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112665371) 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 3 ways as a sum of consecutive naturals, for example, 4612578 + ... + 4613035.

It is an arithmetic number, because the mean of its divisors is an integer number (530472805).

Almost surely, 2^2112665377 is an apocalyptic number.

It is an amenable number.

2112665377 is a deficient number, since it is larger than the sum of its proper divisors (9225843).

2112665377 is an equidigital number, since it uses as much as digits as its factorization.

2112665377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225842.

The product of its digits is 105840, while the sum is 40.

The square root of 2112665377 is about 45963.7398065040. The cubic root of 2112665377 is about 1283.1484539354.

It can be divided in two parts, 2112 and 665377, that added together give a square (667489 = 817²).

The spelling of 2112665377 in words is "two billion, one hundred twelve million, six hundred sixty-five thousand, three hundred seventy-seven".