2121030144 has 160 divisors (see below), whose sum is σ = 6369770880. Its totient is φ = 696729600.

The previous prime is 2121030133. The next prime is 2121030167. The reversal of 2121030144 is 4410301212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980424 + ... + 982584.

It is an arithmetic number, because the mean of its divisors is an integer number (39811068).

Almost surely, 2^2121030144 is an apocalyptic number.

2121030144 is a gapful number since it is divisible by the number (24) 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 2121030144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3184885440).

2121030144 is an abundant number, since it is smaller than the sum of its proper divisors (4248740736).

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

2121030144 is an equidigital number, since it uses as much as digits as its factorization.

2121030144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259 (or 2237 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2121030144 is about 46054.6430232610. The cubic root of 2121030144 is about 1284.8396987982.

Adding to 2121030144 its reverse (4410301212), we get a palindrome (6531331356).

The spelling of 2121030144 in words is "two billion, one hundred twenty-one million, thirty thousand, one hundred forty-four".