3121224660 has 288 divisors, whose sum is σ = 10274584320. Its totient is φ = 764983296.

The previous prime is 3121224529. The next prime is 3121224661. The reversal of 3121224660 is 664221213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121224661) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15843682 + ... + 15843878.

It is an arithmetic number, because the mean of its divisors is an integer number (35675640).

Almost surely, 2^3121224660 is an apocalyptic number.

3121224660 is a gapful number since it is divisible by the number (30) 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 3121224660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5137292160).

3121224660 is an abundant number, since it is smaller than the sum of its proper divisors (7153359660).

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

3121224660 is a wasteful number, since it uses less digits than its factorization.

3121224660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 3121224660 is about 55867.9215650627. The cubic root of 3121224660 is about 1461.4198765936.

Adding to 3121224660 its reverse (664221213), we get a palindrome (3785445873).

The spelling of 3121224660 in words is "three billion, one hundred twenty-one million, two hundred twenty-four thousand, six hundred sixty".