100643211 has 6 divisors (see below), whose sum is σ = 145373540. Its totient is φ = 67095468.

The previous prime is 100643197. The next prime is 100643251. The reversal of 100643211 is 112346001.

It is a happy number.

100643211 is a `hidden beast` number, since 1 + 0 + 0 + 643 + 21 + 1 = 666.

It is not a de Polignac number, because 100643211 - 2⁷ = 100643083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100643251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5591281 + ... + 5591298.

Almost surely, 2^100643211 is an apocalyptic number.

100643211 is a deficient number, since it is larger than the sum of its proper divisors (44730329).

100643211 is a wasteful number, since it uses less digits than its factorization.

100643211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182585 (or 11182582 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 100643211 is about 10032.1090006040. The cubic root of 100643211 is about 465.1519309295.

Adding to 100643211 its reverse (112346001), we get a palindrome (212989212).

The spelling of 100643211 in words is "one hundred million, six hundred forty-three thousand, two hundred eleven".