2121030140 has 24 divisors (see below), whose sum is σ = 4507831440. Its totient is φ = 838189568.

The previous prime is 2121030133. The next prime is 2121030167. The reversal of 2121030140 is 410301212.

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, 637205 + ... + 640524.

It is an arithmetic number, because the mean of its divisors is an integer number (187826310).

Almost surely, 2^2121030140 is an apocalyptic number.

2121030140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121030140 is an abundant number, since it is smaller than the sum of its proper divisors (2386801300).

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

2121030140 is a wasteful number, since it uses less digits than its factorization.

2121030140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277821 (or 1277819 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2121030140 is about 46054.6429798343. The cubic root of 2121030140 is about 1284.8396979905.

Adding to 2121030140 its reverse (410301212), we get a palindrome (2531331352).

The spelling of 2121030140 in words is "two billion, one hundred twenty-one million, thirty thousand, one hundred forty".