2110121728 has 72 divisors (see below), whose sum is σ = 4948450416. Its totient is φ = 885350400.

The previous prime is 2110121723. The next prime is 2110121731. The reversal of 2110121728 is 8271210112.

It is a happy number.

It is a super-2 number, since 2×2110121728² = 8905227413955411968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110121723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7788 + ... + 65428.

It is an arithmetic number, because the mean of its divisors is an integer number (68728478).

Almost surely, 2^2110121728 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 2110121728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2474225208).

2110121728 is an abundant number, since it is smaller than the sum of its proper divisors (2838328688).

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

2110121728 is a wasteful number, since it uses less digits than its factorization.

2110121728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57681 (or 57667 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 2110121728 is about 45936.0613026411. The cubic root of 2110121728 is about 1282.6332768992.

The spelling of 2110121728 in words is "two billion, one hundred ten million, one hundred twenty-one thousand, seven hundred twenty-eight".