2121241536 has 84 divisors (see below), whose sum is σ = 6098252472. Its totient is φ = 704976384.

The previous prime is 2121241531. The next prime is 2121241543. The reversal of 2121241536 is 6351421212.

2121241536 is a `hidden beast` number, since 2 + 1 + 2 + 124 + 1 + 536 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121241531) 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, 194566 + ... + 205178.

Almost surely, 2^2121241536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121241536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3049126236).

2121241536 is an abundant number, since it is smaller than the sum of its proper divisors (3977010936).

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

2121241536 is a wasteful number, since it uses less digits than its factorization.

2121241536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978 (or 10965 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2121241536 is about 46056.9379789842. The cubic root of 2121241536 is about 1284.8823818017.

Adding to 2121241536 its reverse (6351421212), we get a palindrome (8472662748).

The spelling of 2121241536 in words is "two billion, one hundred twenty-one million, two hundred forty-one thousand, five hundred thirty-six".