100212197 has 4 divisors (see below), whose sum is σ = 103667820. Its totient is φ = 96756576.

The previous prime is 100212163. The next prime is 100212223. The reversal of 100212197 is 791212001.

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 35988001 + 64224196 = 5999^2 + 8014^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212197 - 2⁸ = 100211941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212157) 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 in 3 ways as a sum of consecutive naturals, for example, 1727768 + ... + 1727825.

It is an arithmetic number, because the mean of its divisors is an integer number (25916955).

Almost surely, 2^100212197 is an apocalyptic number.

It is an amenable number.

100212197 is a deficient number, since it is larger than the sum of its proper divisors (3455623).

100212197 is an equidigital number, since it uses as much as digits as its factorization.

100212197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455622.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 100212197 is about 10010.6042275179. The cubic root of 100212197 is about 464.4869618216.

Adding to 100212197 its reverse (791212001), we get a palindrome (891424198).

The spelling of 100212197 in words is "one hundred million, two hundred twelve thousand, one hundred ninety-seven".