121213333212 has 48 divisors (see below), whose sum is σ = 285690398112. Its totient is φ = 39996140800.

The previous prime is 121213333193. The next prime is 121213333217. The reversal of 121213333212 is 212333312121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213333217) 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 15 ways as a sum of consecutive naturals, for example, 9395038 + ... + 9407930.

It is an arithmetic number, because the mean of its divisors is an integer number (5951883294).

Almost surely, 2^121213333212 is an apocalyptic number.

121213333212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121213333212 is an abundant number, since it is smaller than the sum of its proper divisors (164477064900).

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

121213333212 is a wasteful number, since it uses less digits than its factorization.

121213333212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20758 (or 20756 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 121213333212 its reverse (212333312121), we get a palindrome (333546645333).

The spelling of 121213333212 in words is "one hundred twenty-one billion, two hundred thirteen million, three hundred thirty-three thousand, two hundred twelve".