2121510384 has 60 divisors (see below), whose sum is σ = 6785468976. Its totient is φ = 606145536.

The previous prime is 2121510383. The next prime is 2121510439. The reversal of 2121510384 is 4830151212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121510383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1051329 + ... + 1053344.

Almost surely, 2^2121510384 is an apocalyptic number.

2121510384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121510384 is an abundant number, since it is smaller than the sum of its proper divisors (4663958592).

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

2121510384 is a wasteful number, since it uses less digits than its factorization.

2121510384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104694 (or 2104685 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2121510384 is about 46059.8565347310. The cubic root of 2121510384 is about 1284.9366618793.

Adding to 2121510384 its reverse (4830151212), we get a palindrome (6951661596).

The spelling of 2121510384 in words is "two billion, one hundred twenty-one million, five hundred ten thousand, three hundred eighty-four".