12121011212212 has 48 divisors (see below), whose sum is σ = 24299894287872. Its totient is φ = 5182319600640.

The previous prime is 12121011212183. The next prime is 12121011212267. The reversal of 12121011212212 is 21221211012121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121011212212.

It is a congruent number.

It is an unprimeable number.

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, 270699058 + ... + 270743830.

It is an arithmetic number, because the mean of its divisors is an integer number (506247797664).

Almost surely, 2^{12121011212212} is an apocalyptic number.

It is an amenable number.

12121011212212 is an abundant number, since it is smaller than the sum of its proper divisors (12178883075660).

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

12121011212212 is a wasteful number, since it uses less digits than its factorization.

12121011212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67648 (or 67646 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121011212212 its reverse (21221211012121), we get a palindrome (33342222224333).

The spelling of 12121011212212 in words is "twelve trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, two hundred twelve".