100211906 has 24 divisors (see below), whose sum is σ = 160508196. Its totient is φ = 46914560.

The previous prime is 100211899. The next prime is 100211921. The reversal of 100211906 is 609112001.

It can be written as a sum of positive squares in 6 ways, for example, as 57896881 + 42315025 = 7609^2 + 6505^2 .

It is a super-2 number, since 2×100211906² = 20084852208305672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162110 + ... + 162726.

Almost surely, 2^100211906 is an apocalyptic number.

100211906 is a deficient number, since it is larger than the sum of its proper divisors (60296290).

100211906 is a wasteful number, since it uses less digits than its factorization.

100211906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 100211906 is about 10010.5896929202. The cubic root of 100211906 is about 464.4865122229.

Adding to 100211906 its reverse (609112001), we get a palindrome (709323907).

The spelling of 100211906 in words is "one hundred million, two hundred eleven thousand, nine hundred six".