2112145274745 has 96 divisors (see below), whose sum is σ = 4010385899520. Its totient is φ = 1019842773120.

The previous prime is 2112145274699. The next prime is 2112145274777. The reversal of 2112145274745 is 5474725412112.

2112145274745 is a `hidden beast` number, since 2 + 1 + 12 + 145 + 27 + 474 + 5 = 666.

It is not a de Polignac number, because 2112145274745 - 2¹¹ = 2112145272697 is a prime.

It is a super-2 number, since 2×2112145274745² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112145274745.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 194357802 + ... + 194368668.

It is an arithmetic number, because the mean of its divisors is an integer number (41774853120).

Almost surely, 2^{2112145274745} is an apocalyptic number.

It is an amenable number.

2112145274745 is a deficient number, since it is larger than the sum of its proper divisors (1898240624775).

2112145274745 is a wasteful number, since it uses less digits than its factorization.

2112145274745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12475 (or 12472 counting only the distinct ones).

The product of its digits is 627200, while the sum is 45.

The spelling of 2112145274745 in words is "two trillion, one hundred twelve billion, one hundred forty-five million, two hundred seventy-four thousand, seven hundred forty-five".