122311145155523 has 4 divisors (see below), whose sum is σ = 122329764608760. Its totient is φ = 122292525702288.

The previous prime is 122311145155457. The next prime is 122311145155559. The reversal of 122311145155523 is 325551541113221.

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 122311145155523 - 2²⁰ = 122311144106947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122311145145523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9309716765 + ... + 9309729902.

It is an arithmetic number, because the mean of its divisors is an integer number (30582441152190).

Almost surely, 2^{122311145155523} is an apocalyptic number.

122311145155523 is a deficient number, since it is larger than the sum of its proper divisors (18619453237).

122311145155523 is an equidigital number, since it uses as much as digits as its factorization.

122311145155523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18619453236.

The product of its digits is 180000, while the sum is 41.

Adding to 122311145155523 its reverse (325551541113221), we get a palindrome (447862686268744).

The spelling of 122311145155523 in words is "one hundred twenty-two trillion, three hundred eleven billion, one hundred forty-five million, one hundred fifty-five thousand, five hundred twenty-three".