121222210221012 has 48 divisors (see below), whose sum is σ = 291836608439040. Its totient is φ = 39143164115328.

The previous prime is 121222210220897. The next prime is 121222210221019. The reversal of 121222210221012 is 210122012222121.

It is a self number, because there is not a number n which added to its sum of digits gives 121222210221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222210221019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206284943 + ... + 1206385430.

It is an arithmetic number, because the mean of its divisors is an integer number (6079929342480).

Almost surely, 2^{121222210221012} is an apocalyptic number.

121222210221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121222210221012 is an abundant number, since it is smaller than the sum of its proper divisors (170614398218028).

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

121222210221012 is a wasteful number, since it uses less digits than its factorization.

121222210221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412670512 (or 2412670510 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121222210221012 its reverse (210122012222121), we get a palindrome (331344222443133).

The spelling of 121222210221012 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred ten million, two hundred twenty-one thousand, twelve".