3121420224 has 224 divisors, whose sum is σ = 9212600320. Its totient is φ = 926650368.

The previous prime is 3121420223. The next prime is 3121420243. The reversal of 3121420224 is 4220241213.

It is a self number, because there is not a number n which added to its sum of digits gives 3121420224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121420223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13630542 + ... + 13630770.

It is an arithmetic number, because the mean of its divisors is an integer number (41127680).

Almost surely, 2^3121420224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121420224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4606300160).

3121420224 is an abundant number, since it is smaller than the sum of its proper divisors (6091180096).

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

3121420224 is a wasteful number, since it uses less digits than its factorization.

3121420224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3121420224 is about 55869.6717727964. The cubic root of 3121420224 is about 1461.4503982829.

Adding to 3121420224 its reverse (4220241213), we get a palindrome (7341661437).

The spelling of 3121420224 in words is "three billion, one hundred twenty-one million, four hundred twenty thousand, two hundred twenty-four".