122523235521 has 4 divisors (see below), whose sum is σ = 163364314032. Its totient is φ = 81682157012.

The previous prime is 122523235511. The next prime is 122523235537. The reversal of 122523235521 is 125532325221.

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 a de Polignac number, because none of the positive numbers 2^k-122523235521 is a prime.

It is a super-3 number, since 3×122523235521³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (122523235501) 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, 20420539251 + ... + 20420539256.

It is an arithmetic number, because the mean of its divisors is an integer number (40841078508).

Almost surely, 2^122523235521 is an apocalyptic number.

It is an amenable number.

122523235521 is a deficient number, since it is larger than the sum of its proper divisors (40841078511).

122523235521 is an equidigital number, since it uses as much as digits as its factorization.

122523235521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40841078510.

The product of its digits is 36000, while the sum is 33.

The spelling of 122523235521 in words is "one hundred twenty-two billion, five hundred twenty-three million, two hundred thirty-five thousand, five hundred twenty-one".