30121212330 has 192 divisors, whose sum is σ = 87800993280. Its totient is φ = 7101360000.

The previous prime is 30121212269. The next prime is 30121212337. The reversal of 30121212330 is 3321212103.

30121212330 is a `hidden beast` number, since 3 + 0 + 121 + 212 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30121212337) 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, 10683661 + ... + 10686479.

It is an arithmetic number, because the mean of its divisors is an integer number (457296840).

Almost surely, 2^30121212330 is an apocalyptic number.

30121212330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121212330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43900496640).

30121212330 is an abundant number, since it is smaller than the sum of its proper divisors (57679780950).

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

30121212330 is a wasteful number, since it uses less digits than its factorization.

30121212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137 (or 3134 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30121212330 its reverse (3321212103), we get a palindrome (33442424433).

The spelling of 30121212330 in words is "thirty billion, one hundred twenty-one million, two hundred twelve thousand, three hundred thirty".