2109179421 has 12 divisors (see below), whose sum is σ = 3061034080. Its totient is φ = 1399454280.

The previous prime is 2109179407. The next prime is 2109179447. The reversal of 2109179421 is 1249719012.

2109179421 is a `hidden beast` number, since 210 + 9 + 17 + 9 + 421 = 666.

It is not a de Polignac number, because 2109179421 - 2⁵ = 2109179389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109179491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553441 + ... + 557238.

Almost surely, 2^2109179421 is an apocalyptic number.

It is an amenable number.

2109179421 is a deficient number, since it is larger than the sum of its proper divisors (951854659).

2109179421 is a wasteful number, since it uses less digits than its factorization.

2109179421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110896 (or 1110893 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2109179421 is about 45925.8034333641. The cubic root of 2109179421 is about 1282.4423219960.

The spelling of 2109179421 in words is "two billion, one hundred nine million, one hundred seventy-nine thousand, four hundred twenty-one".