2122128406 has 8 divisors (see below), whose sum is σ = 3183499800. Its totient is φ = 1060961808.

The previous prime is 2122128403. The next prime is 2122128439. The reversal of 2122128406 is 6048212212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122128403) 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, 21951 + ... + 68746.

It is an arithmetic number, because the mean of its divisors is an integer number (397937475).

Almost surely, 2^2122128406 is an apocalyptic number.

2122128406 is a deficient number, since it is larger than the sum of its proper divisors (1061371394).

2122128406 is a wasteful number, since it uses less digits than its factorization.

2122128406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102398.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2122128406 is about 46066.5649468245. The cubic root of 2122128406 is about 1285.0614223694.

The spelling of 2122128406 in words is "two billion, one hundred twenty-two million, one hundred twenty-eight thousand, four hundred six".