2145121120 has 48 divisors (see below), whose sum is σ = 5150951568. Its totient is φ = 843978240.

The previous prime is 2145121117. The next prime is 2145121159. The reversal of 2145121120 is 211215412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100134 + ... + 119653.

It is an arithmetic number, because the mean of its divisors is an integer number (107311491).

Almost surely, 2^2145121120 is an apocalyptic number.

2145121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145121120 is an abundant number, since it is smaller than the sum of its proper divisors (3005830448).

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

2145121120 is a wasteful number, since it uses less digits than its factorization.

2145121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219863 (or 219855 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2145121120 is about 46315.4522810692. The cubic root of 2145121120 is about 1289.6858638570.

Adding to 2145121120 its reverse (211215412), we get a palindrome (2356336532).

The spelling of 2145121120 in words is "two billion, one hundred forty-five million, one hundred twenty-one thousand, one hundred twenty".