100211245 has 4 divisors (see below), whose sum is σ = 120253500. Its totient is φ = 80168992.

The previous prime is 100211233. The next prime is 100211249. The reversal of 100211245 is 542112001.

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 20448484 + 79762761 = 4522^2 + 8931^2 .

It is a cyclic number.

It is not a de Polignac number, because 100211245 - 2⁷ = 100211117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10021120 + ... + 10021129.

It is an arithmetic number, because the mean of its divisors is an integer number (30063375).

Almost surely, 2^100211245 is an apocalyptic number.

It is an amenable number.

100211245 is a deficient number, since it is larger than the sum of its proper divisors (20042255).

100211245 is an equidigital number, since it uses as much as digits as its factorization.

100211245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20042254.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 100211245 is about 10010.5566778277. The cubic root of 100211245 is about 464.4854909661.

Adding to 100211245 its reverse (542112001), we get a palindrome (642323246).

The spelling of 100211245 in words is "one hundred million, two hundred eleven thousand, two hundred forty-five".