122545115521 has 4 divisors (see below), whose sum is σ = 122549351344. Its totient is φ = 122540879700.

The previous prime is 122545115489. The next prime is 122545115527. The reversal of 122545115521 is 125511545221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125511545221 = 42727 ⋅2937523.

It is a cyclic number.

It is not a de Polignac number, because 122545115521 - 2⁵ = 122545115489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122545115527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074215 + ... + 2132476.

It is an arithmetic number, because the mean of its divisors is an integer number (30637337836).

Almost surely, 2^122545115521 is an apocalyptic number.

It is an amenable number.

122545115521 is a deficient number, since it is larger than the sum of its proper divisors (4235823).

122545115521 is an equidigital number, since it uses as much as digits as its factorization.

122545115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235822.

The product of its digits is 20000, while the sum is 34.

The spelling of 122545115521 in words is "one hundred twenty-two billion, five hundred forty-five million, one hundred fifteen thousand, five hundred twenty-one".