2111912101 has 4 divisors (see below), whose sum is σ = 2274366892. Its totient is φ = 1949457312.

The previous prime is 2111912093. The next prime is 2111912113. The reversal of 2111912101 is 1012191112.

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 268927201 + 1842984900 = 16399^2 + 42930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111912101 - 2³ = 2111912093 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 (2111912401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81227376 + ... + 81227401.

It is an arithmetic number, because the mean of its divisors is an integer number (568591723).

Almost surely, 2^2111912101 is an apocalyptic number.

It is an amenable number.

2111912101 is a deficient number, since it is larger than the sum of its proper divisors (162454791).

2111912101 is a wasteful number, since it uses less digits than its factorization.

2111912101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162454790.

The product of its (nonzero) digits is 36, while the sum is 19.

The square root of 2111912101 is about 45955.5448341111. The cubic root of 2111912101 is about 1282.9959325683.

The spelling of 2111912101 in words is "two billion, one hundred eleven million, nine hundred twelve thousand, one hundred one".