122122101212221 has 4 divisors (see below), whose sum is σ = 133224110413344. Its totient is φ = 111020092011100.

The previous prime is 122122101212203. The next prime is 122122101212261. The reversal of 122122101212221 is 122212101221221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122122101212221 - 2²³ = 122122092823613 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122122101212192 and 122122101212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122101212261) 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 3 ways as a sum of consecutive naturals, for example, 5551004600545 + ... + 5551004600566.

It is an arithmetic number, because the mean of its divisors is an integer number (33306027603336).

Almost surely, 2^{122122101212221} is an apocalyptic number.

122122101212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122122101212221 is a deficient number, since it is larger than the sum of its proper divisors (11102009201123).

122122101212221 is a wasteful number, since it uses less digits than its factorization.

122122101212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102009201122.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 122122101212221 its reverse (122212101221221), we get a palindrome (244334202433442).

The spelling of 122122101212221 in words is "one hundred twenty-two trillion, one hundred twenty-two billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".