122121866 has 4 divisors (see below), whose sum is σ = 183182802. Its totient is φ = 61060932.

The previous prime is 122121859. The next prime is 122121869. The reversal of 122121866 is 668121221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 121638841 + 483025 = 11029^2 + 695^2 .

It is not an unprimeable number, because it can be changed into a prime (122121869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30530465 + ... + 30530468.

Almost surely, 2^122121866 is an apocalyptic number.

122121866 is a deficient number, since it is larger than the sum of its proper divisors (61060936).

122121866 is an equidigital number, since it uses as much as digits as its factorization.

122121866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61060935.

The product of its digits is 2304, while the sum is 29.

The square root of 122121866 is about 11050.8762548497. The cubic root of 122121866 is about 496.1326523666.

The spelling of 122121866 in words is "one hundred twenty-two million, one hundred twenty-one thousand, eight hundred sixty-six".