122120443531 has 4 divisors (see below), whose sum is σ = 122326380792. Its totient is φ = 121914506272.

The previous prime is 122120443513. The next prime is 122120443567. The reversal of 122120443531 is 135344021221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135344021221 = 17 ⋅7961413013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122120443531 is a prime.

It is a super-2 number, since 2×122120443531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122120443531.

It is not an unprimeable number, because it can be changed into a prime (122120443331) 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, 102967741 + ... + 102968926.

It is an arithmetic number, because the mean of its divisors is an integer number (30581595198).

Almost surely, 2^122120443531 is an apocalyptic number.

122120443531 is a deficient number, since it is larger than the sum of its proper divisors (205937261).

122120443531 is an equidigital number, since it uses as much as digits as its factorization.

122120443531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205937260.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 122120443531 its reverse (135344021221), we get a palindrome (257464464752).

The spelling of 122120443531 in words is "one hundred twenty-two billion, one hundred twenty million, four hundred forty-three thousand, five hundred thirty-one".