2112111157 has 4 divisors (see below), whose sum is σ = 2274581260. Its totient is φ = 1949641056.

The previous prime is 2112111139. The next prime is 2112111173. The reversal of 2112111157 is 7511112112.

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 587286756 + 1524824401 = 24234^2 + 39049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112111157 is a prime.

It is a super-3 number, since 3×2112111157³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112111257) 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, 81235032 + ... + 81235057.

It is an arithmetic number, because the mean of its divisors is an integer number (568645315).

Almost surely, 2^2112111157 is an apocalyptic number.

It is an amenable number.

2112111157 is a deficient number, since it is larger than the sum of its proper divisors (162470103).

2112111157 is a wasteful number, since it uses less digits than its factorization.

2112111157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162470102.

The product of its digits is 140, while the sum is 22.

The square root of 2112111157 is about 45957.7105282672. The cubic root of 2112111157 is about 1283.0362404351.

Adding to 2112111157 its reverse (7511112112), we get a palindrome (9623223269).

The spelling of 2112111157 in words is "two billion, one hundred twelve million, one hundred eleven thousand, one hundred fifty-seven".