122500005221 has 16 divisors (see below), whose sum is σ = 133909286400. Its totient is φ = 111136433520.

The previous prime is 122500005193. The next prime is 122500005223.

It is a happy number.

122500005221 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 122500005221 - 2¹⁴ = 122499988837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122500005193 and 122500005202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122500005223) 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 15 ways as a sum of consecutive naturals, for example, 14077730 + ... + 14086428.

It is an arithmetic number, because the mean of its divisors is an integer number (8369330400).

Almost surely, 2^122500005221 is an apocalyptic number.

122500005221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122500005221 is a deficient number, since it is larger than the sum of its proper divisors (11409281179).

122500005221 is a wasteful number, since it uses less digits than its factorization.

122500005221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11176.

The product of its (nonzero) digits is 400, while the sum is 20.

It can be divided in two parts, 12250000 and 5221, that added together give a palindrome (12255221).

The spelling of 122500005221 in words is "one hundred twenty-two billion, five hundred million, five thousand, two hundred twenty-one".