100121473 has 2 divisors, whose sum is σ = 100121474. Its totient is φ = 100121472.

The previous prime is 100121453. The next prime is 100121521. The reversal of 100121473 is 374121001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84217329 + 15904144 = 9177^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121473 - 2⁹ = 100120961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100121473.

It is not a weakly prime, because it can be changed into another prime (100121423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060736 + 50060737.

It is an arithmetic number, because the mean of its divisors is an integer number (50060737).

Almost surely, 2^100121473 is an apocalyptic number.

It is an amenable number.

100121473 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121473 is an equidigital number, since it uses as much as digits as its factorization.

100121473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 100121473 is about 10006.0718066582. The cubic root of 100121473 is about 464.3467498862.

Adding to 100121473 its reverse (374121001), we get a palindrome (474242474).

The spelling of 100121473 in words is "one hundred million, one hundred twenty-one thousand, four hundred seventy-three".