122028817 has 4 divisors (see below), whose sum is σ = 122051556. Its totient is φ = 122006080.

The previous prime is 122028799. The next prime is 122028821. The reversal of 122028817 is 718820221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 718820221 = 7 ⋅102688603.

It can be written as a sum of positive squares in 2 ways, for example, as 45711121 + 76317696 = 6761^2 + 8736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122028817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122028827) 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, 1653 + ... + 15709.

It is an arithmetic number, because the mean of its divisors is an integer number (30512889).

Almost surely, 2^122028817 is an apocalyptic number.

It is an amenable number.

122028817 is a deficient number, since it is larger than the sum of its proper divisors (22739).

122028817 is an equidigital number, since it uses as much as digits as its factorization.

122028817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22738.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 122028817 is about 11046.6654244618. The cubic root of 122028817 is about 496.0066133028.

The spelling of 122028817 in words is "one hundred twenty-two million, twenty-eight thousand, eight hundred seventeen".