100211505445 has 4 divisors (see below), whose sum is σ = 120253806540. Its totient is φ = 80169204352.

The previous prime is 100211505439. The next prime is 100211505467. The reversal of 100211505445 is 544505112001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59439415204 + 40772090241 = 243802^2 + 201921^2 .

It is a cyclic number.

It is not a de Polignac number, because 100211505445 - 2⁹ = 100211504933 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10021150540 + ... + 10021150549.

It is an arithmetic number, because the mean of its divisors is an integer number (30063451635).

Almost surely, 2^100211505445 is an apocalyptic number.

It is an amenable number.

100211505445 is a deficient number, since it is larger than the sum of its proper divisors (20042301095).

100211505445 is an equidigital number, since it uses as much as digits as its factorization.

100211505445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20042301094.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 100211505445 its reverse (544505112001), we get a palindrome (644716617446).

The spelling of 100211505445 in words is "one hundred billion, two hundred eleven million, five hundred five thousand, four hundred forty-five".