30121212222 has 24 divisors (see below), whose sum is σ = 65275492464. Its totient is φ = 10038424704.

The previous prime is 30121212179. The next prime is 30121212223. The reversal of 30121212222 is 22221212103.

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

It is a junction number, because it is equal to n+sod(n) for n = 30121212195 and 30121212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121212223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69618 + ... + 255125.

It is an arithmetic number, because the mean of its divisors is an integer number (2719812186).

Almost surely, 2^30121212222 is an apocalyptic number.

30121212222 is an abundant number, since it is smaller than the sum of its proper divisors (35154280242).

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

30121212222 is a wasteful number, since it uses less digits than its factorization.

30121212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329904 (or 329901 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 30121212222 its reverse (22221212103), we get a palindrome (52342424325).

The spelling of 30121212222 in words is "thirty billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".