100123211 has 4 divisors (see below), whose sum is σ = 103353024. Its totient is φ = 96893400.

The previous prime is 100123193. The next prime is 100123213. The reversal of 100123211 is 112321001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100123211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100123192 and 100123201.

It is not an unprimeable number, because it can be changed into a prime (100123213) 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, 1614860 + ... + 1614921.

It is an arithmetic number, because the mean of its divisors is an integer number (25838256).

Almost surely, 2^100123211 is an apocalyptic number.

100123211 is a deficient number, since it is larger than the sum of its proper divisors (3229813).

100123211 is an equidigital number, since it uses as much as digits as its factorization.

100123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229812.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 100123211 is about 10006.1586535493. The cubic root of 100123211 is about 464.3494367224.

Adding to 100123211 its reverse (112321001), we get a palindrome (212444212).

The spelling of 100123211 in words is "one hundred million, one hundred twenty-three thousand, two hundred eleven".