122120455221 has 10 divisors (see below), whose sum is σ = 182426852982. Its totient is φ = 81413636760.

The previous prime is 122120455217. The next prime is 122120455229. The reversal of 122120455221 is 122554021221.

122120455221 is a `hidden beast` number, since 12 + 2 + 120 + 4 + 5 + 522 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80550954225 + 41569500996 = 283815^2 + 203886^2 .

It is not a de Polignac number, because 122120455221 - 2² = 122120455217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122120455229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 753829890 + ... + 753830051.

Almost surely, 2^122120455221 is an apocalyptic number.

It is an amenable number.

122120455221 is a deficient number, since it is larger than the sum of its proper divisors (60306397761).

122120455221 is an equidigital number, since it uses as much as digits as its factorization.

122120455221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507659953 (or 1507659944 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 122120455221 its reverse (122554021221), we get a palindrome (244674476442).

The spelling of 122120455221 in words is "one hundred twenty-two billion, one hundred twenty million, four hundred fifty-five thousand, two hundred twenty-one".