2121521160 has 128 divisors (see below), whose sum is σ = 7012344960. Its totient is φ = 509184000.

The previous prime is 2121521141. The next prime is 2121521183. The reversal of 2121521160 is 611251212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125364 + ... + 141276.

It is an arithmetic number, because the mean of its divisors is an integer number (54783945).

Almost surely, 2^2121521160 is an apocalyptic number.

2121521160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121521160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3506172480).

2121521160 is an abundant number, since it is smaller than the sum of its proper divisors (4890823800).

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

2121521160 is a wasteful number, since it uses less digits than its factorization.

2121521160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16039 (or 16035 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 2121521160 is about 46059.9735128018. The cubic root of 2121521160 is about 1284.9388374448.

Adding to 2121521160 its reverse (611251212), we get a palindrome (2732772372).

It can be divided in two parts, 212152 and 1160, that added together give a palindrome (213312).

The spelling of 2121521160 in words is "two billion, one hundred twenty-one million, five hundred twenty-one thousand, one hundred sixty".