122221221021221 has 16 divisors (see below), whose sum is σ = 140135193918720. Its totient is φ = 104420720158080.

The previous prime is 122221221021121. The next prime is 122221221021281. The reversal of 122221221021221 is 122120122122221.

It is a cyclic number.

It is not a de Polignac number, because 122221221021221 - 2¹⁴ = 122221221004837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221221021281) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 65603945 + ... + 67441233.

It is an arithmetic number, because the mean of its divisors is an integer number (8758449619920).

Almost surely, 2^{122221221021221} is an apocalyptic number.

It is an amenable number.

122221221021221 is a deficient number, since it is larger than the sum of its proper divisors (17913972897499).

122221221021221 is a wasteful number, since it uses less digits than its factorization.

122221221021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868164.

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

Adding to 122221221021221 its reverse (122120122122221), we get a palindrome (244341343143442).

The spelling of 122221221021221 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".