2121139648 has 28 divisors (see below), whose sum is σ = 4216148032. Its totient is φ = 1058803200.

The previous prime is 2121139639. The next prime is 2121139661. The reversal of 2121139648 is 8469311212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11548 + ... + 66148.

Almost surely, 2^2121139648 is an apocalyptic number.

It is an amenable number.

2121139648 is a deficient number, since it is larger than the sum of its proper divisors (2095008384).

2121139648 is an equidigital number, since it uses as much as digits as its factorization.

2121139648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55220 (or 55210 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 2121139648 is about 46055.8318565630. The cubic root of 2121139648 is about 1284.8618095425.

The spelling of 2121139648 in words is "two billion, one hundred twenty-one million, one hundred thirty-nine thousand, six hundred forty-eight".