30121224 has 64 divisors (see below), whose sum is σ = 88179840. Its totient is φ = 8394240.

The previous prime is 30121207. The next prime is 30121241. The reversal of 30121224 is 42212103.

It is an interprime number because it is at equal distance from previous prime (30121207) and next prime (30121241).

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, 4702 + ... + 9074.

It is an arithmetic number, because the mean of its divisors is an integer number (1377810).

Almost surely, 2^30121224 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 30121224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44089920).

30121224 is an abundant number, since it is smaller than the sum of its proper divisors (58058616).

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

30121224 is a wasteful number, since it uses less digits than its factorization.

30121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 30121224 is about 5488.2806050711. The cubic root of 30121224 is about 311.1412116379.

Adding to 30121224 its reverse (42212103), we get a palindrome (72333327).

The spelling of 30121224 in words is "thirty million, one hundred twenty-one thousand, two hundred twenty-four".