2112125666136 has 128 divisors (see below), whose sum is σ = 5677132320000. Its totient is φ = 652817041920.

The previous prime is 2112125666129. The next prime is 2112125666137. The reversal of 2112125666136 is 6316665212112.

It is a super-2 number, since 2×2112125666136² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112125666137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5989606 + ... + 6332426.

It is an arithmetic number, because the mean of its divisors is an integer number (44352596250).

Almost surely, 2^{2112125666136} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2112125666136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2838566160000).

2112125666136 is an abundant number, since it is smaller than the sum of its proper divisors (3565006653864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2112125666136 is a wasteful number, since it uses less digits than its factorization.

2112125666136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343137 (or 343133 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The spelling of 2112125666136 in words is "two trillion, one hundred twelve billion, one hundred twenty-five million, six hundred sixty-six thousand, one hundred thirty-six".