122538824191 has 4 divisors (see below), whose sum is σ = 140044370512. Its totient is φ = 105033277872.

The previous prime is 122538824189. The next prime is 122538824197. The reversal of 122538824191 is 191428835221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122538824191 - 2¹ = 122538824189 is a prime.

It is a super-2 number, since 2×122538824191² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122538824197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8752773150 + ... + 8752773163.

It is an arithmetic number, because the mean of its divisors is an integer number (35011092628).

Almost surely, 2^122538824191 is an apocalyptic number.

122538824191 is a deficient number, since it is larger than the sum of its proper divisors (17505546321).

122538824191 is an equidigital number, since it uses as much as digits as its factorization.

122538824191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17505546320.

The product of its digits is 276480, while the sum is 46.

It can be divided in two parts, 122538 and 824191, that added together give a square (946729 = 973²).

The spelling of 122538824191 in words is "one hundred twenty-two billion, five hundred thirty-eight million, eight hundred twenty-four thousand, one hundred ninety-one".