121222212 has 72 divisors (see below), whose sum is σ = 298779264. Its totient is φ = 38233728.

The previous prime is 121222193. The next prime is 121222237. The reversal of 121222212 is 212222121.

121222212 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

121222212 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 121222191 and 121222200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 772038 + ... + 772194.

It is an arithmetic number, because the mean of its divisors is an integer number (4149712).

Almost surely, 2^121222212 is an apocalyptic number.

121222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121222212 is an abundant number, since it is smaller than the sum of its proper divisors (177557052).

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

121222212 is a wasteful number, since it uses less digits than its factorization.

121222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 246 counting only the distinct ones).

The product of its digits is 64, while the sum is 15.

The square root of 121222212 is about 11010.0959123888. The cubic root of 121222212 is about 494.9113360224.

Adding to 121222212 its reverse (212222121), we get a palindrome (333444333).

Subtracting 121222212 from its reverse (212222121), we obtain a palindrome (90999909).

The spelling of 121222212 in words is "one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".