122720827 has 4 divisors (see below), whose sum is σ = 122769640. Its totient is φ = 122672016.

The previous prime is 122720821. The next prime is 122720861. The reversal of 122720827 is 728027221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728027221 = 239 ⋅3046139.

It is a cyclic number.

It is not a de Polignac number, because 122720827 - 2¹¹ = 122718779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122720821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20418 + ... + 25735.

It is an arithmetic number, because the mean of its divisors is an integer number (30692410).

Almost surely, 2^122720827 is an apocalyptic number.

122720827 is a deficient number, since it is larger than the sum of its proper divisors (48813).

122720827 is an equidigital number, since it uses as much as digits as its factorization.

122720827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48812.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 122720827 is about 11077.9432657872. The cubic root of 122720827 is about 496.9424434749.

The spelling of 122720827 in words is "one hundred twenty-two million, seven hundred twenty thousand, eight hundred twenty-seven".