121210212 has 24 divisors (see below), whose sum is σ = 286233696. Its totient is φ = 39916288.

The previous prime is 121210183. The next prime is 121210213. The reversal of 121210212 is 212012121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (121210213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 59853 + ... + 61844.

It is an arithmetic number, because the mean of its divisors is an integer number (11926404).

Almost surely, 2^121210212 is an apocalyptic number.

121210212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121210212 is an abundant number, since it is smaller than the sum of its proper divisors (165023484).

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

121210212 is a wasteful number, since it uses less digits than its factorization.

121210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121787 (or 121785 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121210212 is about 11009.5509445209. The cubic root of 121210212 is about 494.8950047689.

Adding to 121210212 its reverse (212012121), we get a palindrome (333222333).

The spelling of 121210212 in words is "one hundred twenty-one million, two hundred ten thousand, two hundred twelve".