12120021212222 has 96 divisors (see below), whose sum is σ = 23512964381280. Its totient is φ = 4632435360000.

The previous prime is 12120021212213. The next prime is 12120021212419. The reversal of 12120021212222 is 22221212002121.

It is a super-2 number, since 2×12120021212222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120021212194 and 12120021212203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11357072 + ... + 12378332.

It is an arithmetic number, because the mean of its divisors is an integer number (244926712305).

Almost surely, 2^{12120021212222} is an apocalyptic number.

12120021212222 is a deficient number, since it is larger than the sum of its proper divisors (11392943169058).

12120021212222 is a wasteful number, since it uses less digits than its factorization.

12120021212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021498 (or 1021491 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12120021212222 its reverse (22221212002121), we get a palindrome (34341233214343).

The spelling of 12120021212222 in words is "twelve trillion, one hundred twenty billion, twenty-one million, two hundred twelve thousand, two hundred twenty-two".