2144121140 has 48 divisors (see below), whose sum is σ = 5284981632. Its totient is φ = 715257216.

The previous prime is 2144121131. The next prime is 2144121143. The reversal of 2144121140 is 411214412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144121143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201782 + ... + 212141.

It is an arithmetic number, because the mean of its divisors is an integer number (110103784).

Almost surely, 2^2144121140 is an apocalyptic number.

2144121140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144121140 is an abundant number, since it is smaller than the sum of its proper divisors (3140860492).

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

2144121140 is a wasteful number, since it uses less digits than its factorization.

2144121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413976 (or 413974 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 2144121140 is about 46304.6557054472. The cubic root of 2144121140 is about 1289.4854306495.

Adding to 2144121140 its reverse (411214412), we get a palindrome (2555335552).

The spelling of 2144121140 in words is "two billion, one hundred forty-four million, one hundred twenty-one thousand, one hundred forty".