122421503156 has 12 divisors (see below), whose sum is σ = 214314136260. Its totient is φ = 61188892800.

The previous prime is 122421503153. The next prime is 122421503179. The reversal of 122421503156 is 651305124221.

It can be written as a sum of positive squares in 2 ways, for example, as 85214951056 + 37206552100 = 291916^2 + 192890^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122421503153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5452091 + ... + 5474498.

It is an arithmetic number, because the mean of its divisors is an integer number (17859511355).

Almost surely, 2^122421503156 is an apocalyptic number.

It is an amenable number.

122421503156 is a deficient number, since it is larger than the sum of its proper divisors (91892633104).

122421503156 is a wasteful number, since it uses less digits than its factorization.

122421503156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10929394 (or 10929392 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 122421503156 its reverse (651305124221), we get a palindrome (773726627377).

The spelling of 122421503156 in words is "one hundred twenty-two billion, four hundred twenty-one million, five hundred three thousand, one hundred fifty-six".