2109121352 has 36 divisors (see below), whose sum is σ = 4285633995. Its totient is φ = 972661248.

The previous prime is 2109121351. The next prime is 2109121361. The reversal of 2109121352 is 2531219012.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 188403076 + 1920718276 = 13726^2 + 43826^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=32474.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109121351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1688024 + ... + 1689272.

Almost surely, 2^2109121352 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 2109121352

2109121352 is an abundant number, since it is smaller than the sum of its proper divisors (2176512643).

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

2109121352 is an equidigital number, since it uses as much as digits as its factorization.

2109121352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 2109121352 is about 45925.1712245039. The cubic root of 2109121352 is about 1282.4305526753.

The spelling of 2109121352 in words is "two billion, one hundred nine million, one hundred twenty-one thousand, three hundred fifty-two".