30121200212 has 6 divisors (see below), whose sum is σ = 52712100378. Its totient is φ = 15060600104.

The previous prime is 30121200199. The next prime is 30121200293. The reversal of 30121200212 is 21200212103.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22630990096 + 7490210116 = 150436^2 + 86546^2 .

It is a super-2 number, since 2×30121200212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3765150023 + ... + 3765150030.

It is an arithmetic number, because the mean of its divisors is an integer number (8785350063).

Almost surely, 2^30121200212 is an apocalyptic number.

It is an amenable number.

30121200212 is a deficient number, since it is larger than the sum of its proper divisors (22590900166).

30121200212 is a wasteful number, since it uses less digits than its factorization.

30121200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7530300057 (or 7530300055 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 30121200212 its reverse (21200212103), we get a palindrome (51321412315).

The spelling of 30121200212 in words is "thirty billion, one hundred twenty-one million, two hundred thousand, two hundred twelve".