122878438181 has 4 divisors (see below), whose sum is σ = 122879938752. Its totient is φ = 122876937612.

The previous prime is 122878438159. The next prime is 122878438217. The reversal of 122878438181 is 181834878221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122878438181 - 2³⁰ = 121804696357 is a prime.

It is a super-2 number, since 2×122878438181² (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 (122878438121) 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, 619901 + ... + 793746.

It is an arithmetic number, because the mean of its divisors is an integer number (30719984688).

Almost surely, 2^122878438181 is an apocalyptic number.

It is an amenable number.

122878438181 is a deficient number, since it is larger than the sum of its proper divisors (1500571).

122878438181 is an equidigital number, since it uses as much as digits as its factorization.

122878438181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500570.

The product of its digits is 1376256, while the sum is 53.

The spelling of 122878438181 in words is "one hundred twenty-two billion, eight hundred seventy-eight million, four hundred thirty-eight thousand, one hundred eighty-one".