122205026421 has 6 divisors (see below), whose sum is σ = 176518371510. Its totient is φ = 81470017608.

The previous prime is 122205026417. The next prime is 122205026497. The reversal of 122205026421 is 124620502221.

122205026421 is a `hidden beast` number, since 12 + 2 + 2 + 0 + 5 + 0 + 2 + 642 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 88633625796 + 33571400625 = 297714^2 + 183225^2 .

It is not a de Polignac number, because 122205026421 - 2² = 122205026417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122205026521) 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 5 ways as a sum of consecutive naturals, for example, 6789168126 + ... + 6789168143.

It is an arithmetic number, because the mean of its divisors is an integer number (29419728585).

Almost surely, 2^122205026421 is an apocalyptic number.

It is an amenable number.

122205026421 is a deficient number, since it is larger than the sum of its proper divisors (54313345089).

122205026421 is a wasteful number, since it uses less digits than its factorization.

122205026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13578336275 (or 13578336272 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 122205026421 its reverse (124620502221), we get a palindrome (246825528642).

The spelling of 122205026421 in words is "one hundred twenty-two billion, two hundred five million, twenty-six thousand, four hundred twenty-one".