121221021221222 has 12 divisors (see below), whose sum is σ = 196894498966380. Its totient is φ = 55948163640408.

The previous prime is 121221021221219. The next prime is 121221021221233. The reversal of 121221021221222 is 222122120122121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179321036972 + ... + 179321037647.

It is an arithmetic number, because the mean of its divisors is an integer number (16407874913865).

Almost surely, 2^{121221021221222} is an apocalyptic number.

121221021221222 is a deficient number, since it is larger than the sum of its proper divisors (75673477745158).

121221021221222 is a wasteful number, since it uses less digits than its factorization.

121221021221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358642074647 (or 358642074634 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 121221021221222 its reverse (222122120122121), we get a palindrome (343343141343343).

The spelling of 121221021221222 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".