122916881 has 2 divisors, whose sum is σ = 122916882. Its totient is φ = 122916880.

The previous prime is 122916863. The next prime is 122916949. The reversal of 122916881 is 188619221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111492481 + 11424400 = 10559^2 + 3380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122916881 is a prime.

It is a super-2 number, since 2×122916881² = 30217119269536322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122916821) 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 as a sum of consecutive naturals, namely, 61458440 + 61458441.

It is an arithmetic number, because the mean of its divisors is an integer number (61458441).

Almost surely, 2^122916881 is an apocalyptic number.

It is an amenable number.

122916881 is a deficient number, since it is larger than the sum of its proper divisors (1).

122916881 is an equidigital number, since it uses as much as digits as its factorization.

122916881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 38.

The square root of 122916881 is about 11086.7885792054. The cubic root of 122916881 is about 497.2069346240.

The spelling of 122916881 in words is "one hundred twenty-two million, nine hundred sixteen thousand, eight hundred eighty-one".