121112100211 has 4 divisors (see below), whose sum is σ = 121112921800. Its totient is φ = 121111278624.

The previous prime is 121112100203. The next prime is 121112100227. The reversal of 121112100211 is 112001211121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121112100211 - 2³ = 121112100203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121112100191 and 121112100200.

It is not an unprimeable number, because it can be changed into a prime (121112100911) 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, 122001 + ... + 507058.

It is an arithmetic number, because the mean of its divisors is an integer number (30278230450).

Almost surely, 2^121112100211 is an apocalyptic number.

121112100211 is a deficient number, since it is larger than the sum of its proper divisors (821589).

121112100211 is an equidigital number, since it uses as much as digits as its factorization.

121112100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821588.

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

Adding to 121112100211 its reverse (112001211121), we get a palindrome (233113311332).

The spelling of 121112100211 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred thousand, two hundred eleven".