2721212124 has 48 divisors (see below), whose sum is σ = 6381462528. Its totient is φ = 902518848.

The previous prime is 2721212119. The next prime is 2721212159. The reversal of 2721212124 is 4212121272.

It is a junction number, because it is equal to n+sod(n) for n = 2721212094 and 2721212103.

It is a congruent number.

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, 3594354 + ... + 3595110.

It is an arithmetic number, because the mean of its divisors is an integer number (132947136).

Almost surely, 2^2721212124 is an apocalyptic number.

It is an amenable number.

2721212124 is an abundant number, since it is smaller than the sum of its proper divisors (3660250404).

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

2721212124 is a wasteful number, since it uses less digits than its factorization.

2721212124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874 (or 1872 counting only the distinct ones).

The product of its digits is 896, while the sum is 24.

The square root of 2721212124 is about 52165.2386556412. The cubic root of 2721212124 is about 1396.1137329582.

Adding to 2721212124 its reverse (4212121272), we get a palindrome (6933333396).

The spelling of 2721212124 in words is "two billion, seven hundred twenty-one million, two hundred twelve thousand, one hundred twenty-four".