122545545221 has 12 divisors (see below), whose sum is σ = 134862600096. Its totient is φ = 111269586120.

The previous prime is 122545545167. The next prime is 122545545229.

122545545221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 122545545221 - 2²⁶ = 122478436357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122545545229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515711 + ... + 714876.

It is an arithmetic number, because the mean of its divisors is an integer number (11238550008).

Almost surely, 2^122545545221 is an apocalyptic number.

122545545221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122545545221 is a deficient number, since it is larger than the sum of its proper divisors (12317054875).

122545545221 is a wasteful number, since it uses less digits than its factorization.

122545545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231432 (or 1231421 counting only the distinct ones).

The product of its digits is 160000, while the sum is 38.

It can be divided in two parts, 122545 and 545221, that added together give a palindrome (667766).

The spelling of 122545545221 in words is "one hundred twenty-two billion, five hundred forty-five million, five hundred forty-five thousand, two hundred twenty-one".