100211121211 has 4 divisors (see below), whose sum is σ = 100213034752. Its totient is φ = 100209207672.

The previous prime is 100211121209. The next prime is 100211121223. The reversal of 100211121211 is 112121112001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 100211121211 - 2¹ = 100211121209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100211121191 and 100211121200.

It is not an unprimeable number, because it can be changed into a prime (100211121611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875940 + ... + 983713.

It is an arithmetic number, because the mean of its divisors is an integer number (25053258688).

Almost surely, 2^100211121211 is an apocalyptic number.

100211121211 is a deficient number, since it is larger than the sum of its proper divisors (1913541).

100211121211 is an equidigital number, since it uses as much as digits as its factorization.

100211121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913540.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100211121211 its reverse (112121112001), we get a palindrome (212332233212).

The spelling of 100211121211 in words is "one hundred billion, two hundred eleven million, one hundred twenty-one thousand, two hundred eleven".