100122881 has 2 divisors, whose sum is σ = 100122882. Its totient is φ = 100122880.

The previous prime is 100122833. The next prime is 100122889. The reversal of 100122881 is 188221001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 30250000 = 8359^2 + 5500^2 .

It is a cyclic number.

It is not a de Polignac number, because 100122881 - 2²² = 95928577 is a prime.

It is a super-2 number, since 2×100122881² = 20049182599480322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100122889) 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 as a sum of consecutive naturals, namely, 50061440 + 50061441.

It is an arithmetic number, because the mean of its divisors is an integer number (50061441).

Almost surely, 2^100122881 is an apocalyptic number.

It is an amenable number.

100122881 is a deficient number, since it is larger than the sum of its proper divisors (1).

100122881 is an equidigital number, since it uses as much as digits as its factorization.

100122881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 100122881 is about 10006.1421636913. The cubic root of 100122881 is about 464.3489265660.

Adding to 100122881 its reverse (188221001), we get a palindrome (288343882).

The spelling of 100122881 in words is "one hundred million, one hundred twenty-two thousand, eight hundred eighty-one".