2112128402 has 8 divisors (see below), whose sum is σ = 3169116300. Its totient is φ = 1055756304.

The previous prime is 2112128401. The next prime is 2112128411. The reversal of 2112128402 is 2048212112.

It can be written as a sum of positive squares in 2 ways, for example, as 1947545161 + 164583241 = 44131^2 + 12829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2112128402² = 8922172773070147208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2112128401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145277 + ... + 159152.

Almost surely, 2^2112128402 is an apocalyptic number.

2112128402 is a deficient number, since it is larger than the sum of its proper divisors (1056987898).

2112128402 is a wasteful number, since it uses less digits than its factorization.

2112128402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307900.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 2112128402 is about 45957.8981460206. The cubic root of 2112128402 is about 1283.0397323441.

The spelling of 2112128402 in words is "two billion, one hundred twelve million, one hundred twenty-eight thousand, four hundred two".