2121588920 has 32 divisors (see below), whose sum is σ = 5207537520. Its totient is φ = 771486720.

The previous prime is 2121588919. The next prime is 2121588961. The reversal of 2121588920 is 298851212.

It is a super-2 number, since 2×2121588920² = 9002279090933532800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2410457 + ... + 2411336.

Almost surely, 2^2121588920 is an apocalyptic number.

2121588920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121588920 is an abundant number, since it is smaller than the sum of its proper divisors (3085948600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121588920 is a wasteful number, since it uses less digits than its factorization.

2121588920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821815 (or 4821811 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 2121588920 is about 46060.7090696615. The cubic root of 2121588920 is about 1284.9525173348.

The spelling of 2121588920 in words is "two billion, one hundred twenty-one million, five hundred eighty-eight thousand, nine hundred twenty".