2120111894 has 16 divisors (see below), whose sum is σ = 3321354240. Its totient is φ = 1013074920.

The previous prime is 2120111893. The next prime is 2120111899. The reversal of 2120111894 is 4981110212.

It is a super-3 number, since 3×2120111894³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120111893) 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 7 ways as a sum of consecutive naturals, for example, 34187 + ... + 73545.

It is an arithmetic number, because the mean of its divisors is an integer number (207584640).

Almost surely, 2^2120111894 is an apocalyptic number.

2120111894 is a deficient number, since it is larger than the sum of its proper divisors (1201242346).

2120111894 is a wasteful number, since it uses less digits than its factorization.

2120111894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40555.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 2120111894 is about 46044.6728080459. The cubic root of 2120111894 is about 1284.6542583486.

The spelling of 2120111894 in words is "two billion, one hundred twenty million, one hundred eleven thousand, eight hundred ninety-four".