100217122 has 4 divisors (see below), whose sum is σ = 150325686. Its totient is φ = 50108560.

The previous prime is 100217119. The next prime is 100217123. The reversal of 100217122 is 221712001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221712001 = 7 ⋅31673143.

It can be written as a sum of positive squares in only one way, i.e., 96059601 + 4157521 = 9801^2 + 2039^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100217096 and 100217105.

It is not an unprimeable number, because it can be changed into a prime (100217123) 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, 25054279 + ... + 25054282.

Almost surely, 2^100217122 is an apocalyptic number.

100217122 is a deficient number, since it is larger than the sum of its proper divisors (50108564).

100217122 is an equidigital number, since it uses as much as digits as its factorization.

100217122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50108563.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 100217122 is about 10010.8502136432. The cubic root of 100217122 is about 464.4945708781.

Adding to 100217122 its reverse (221712001), we get a palindrome (321929123).

The spelling of 100217122 in words is "one hundred million, two hundred seventeen thousand, one hundred twenty-two".