2100255612 has 144 divisors (see below), whose sum is σ = 6103544832. Its totient is φ = 550368000.

The previous prime is 2100255607. The next prime is 2100255613. The reversal of 2100255612 is 2165520012.

It is a happy number.

It is a super-2 number, since 2×2100255612² = 8822147271474989088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100255613) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2796237 + ... + 2796987.

It is an arithmetic number, because the mean of its divisors is an integer number (42385728).

Almost surely, 2^2100255612 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 2100255612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3051772416).

2100255612 is an abundant number, since it is smaller than the sum of its proper divisors (4003289220).

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

2100255612 is a wasteful number, since it uses less digits than its factorization.

2100255612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2100255612 is about 45828.5458202636. The cubic root of 2100255612 is about 1280.6311202449.

Adding to 2100255612 its reverse (2165520012), we get a palindrome (4265775624).

The spelling of 2100255612 in words is "two billion, one hundred million, two hundred fifty-five thousand, six hundred twelve".