121212212244 has 48 divisors (see below), whose sum is σ = 299498976000. Its totient is φ = 38023105536.

The previous prime is 121212212197. The next prime is 121212212257. The reversal of 121212212244 is 442212212121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2142432 + ... + 2198280.

It is an arithmetic number, because the mean of its divisors is an integer number (6239562000).

Almost surely, 2^121212212244 is an apocalyptic number.

It is an amenable number.

121212212244 is an abundant number, since it is smaller than the sum of its proper divisors (178286763756).

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

121212212244 is a wasteful number, since it uses less digits than its factorization.

121212212244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66512 (or 66510 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

Adding to 121212212244 its reverse (442212212121), we get a palindrome (563424424365).

The spelling of 121212212244 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred forty-four".