2111661110 has 32 divisors (see below), whose sum is σ = 4154486112. Its totient is φ = 768049920.

The previous prime is 2111661107. The next prime is 2111661113. The reversal of 2111661110 is 111661112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2111661107) and next prime (2111661113).

It is a super-2 number, since 2×2111661110² = 8918225286972864200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111661113) 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, 112511 + ... + 129930.

It is an arithmetic number, because the mean of its divisors is an integer number (129827691).

Almost surely, 2^2111661110 is an apocalyptic number.

2111661110 is a deficient number, since it is larger than the sum of its proper divisors (2042825002).

2111661110 is a wasteful number, since it uses less digits than its factorization.

2111661110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242528.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 2111661110 is about 45952.8139508344. The cubic root of 2111661110 is about 1282.9451045075.

The spelling of 2111661110 in words is "two billion, one hundred eleven million, six hundred sixty-one thousand, one hundred ten".