2121096856 has 8 divisors (see below), whose sum is σ = 3977056620. Its totient is φ = 1060548424.

The previous prime is 2121096839. The next prime is 2121096871. The reversal of 2121096856 is 6586901212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 132568546 + ... + 132568561.

Almost surely, 2^2121096856 is an apocalyptic number.

It is an amenable number.

2121096856 is a deficient number, since it is larger than the sum of its proper divisors (1855959764).

2121096856 is a wasteful number, since it uses less digits than its factorization.

2121096856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265137113 (or 265137109 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2121096856 is about 46055.3672876463. The cubic root of 2121096856 is about 1284.8531691910.

The spelling of 2121096856 in words is "two billion, one hundred twenty-one million, ninety-six thousand, eight hundred fifty-six".