122101112221221 has 32 divisors (see below), whose sum is σ = 192778494467328. Its totient is φ = 67285568609280.

The previous prime is 122101112221159. The next prime is 122101112221267. The reversal of 122101112221221 is 122122211101221.

It is not a de Polignac number, because 122101112221221 - 2⁷ = 122101112221093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122101112221321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695240910 + ... + 695416511.

It is an arithmetic number, because the mean of its divisors is an integer number (6024327952104).

Almost surely, 2^{122101112221221} is an apocalyptic number.

It is an amenable number.

122101112221221 is a deficient number, since it is larger than the sum of its proper divisors (70677382246107).

122101112221221 is a wasteful number, since it uses less digits than its factorization.

122101112221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390657581.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 122101112221221 its reverse (122122211101221), we get a palindrome (244223323322442).

The spelling of 122101112221221 in words is "one hundred twenty-two trillion, one hundred one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".