121020213412 has 24 divisors (see below), whose sum is σ = 249848184320. Its totient is φ = 50192714880.

The previous prime is 121020213367. The next prime is 121020213449. The reversal of 121020213412 is 214312020121.

It is a self number, because there is not a number n which added to its sum of digits gives 121020213412.

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 7 ways as a sum of consecutive naturals, for example, 69711237 + ... + 69712972.

Almost surely, 2^121020213412 is an apocalyptic number.

It is an amenable number.

121020213412 is an abundant number, since it is smaller than the sum of its proper divisors (128827970908).

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

121020213412 is a wasteful number, since it uses less digits than its factorization.

121020213412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139424251 (or 139424249 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121020213412 its reverse (214312020121), we get a palindrome (335332233533).

The spelling of 121020213412 in words is "one hundred twenty-one billion, twenty million, two hundred thirteen thousand, four hundred twelve".