211111012121 has 8 divisors (see below), whose sum is σ = 212586593280. Its totient is φ = 209640246192.

The previous prime is 211111012097. The next prime is 211111012163. The reversal of 211111012121 is 121210111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211111012121 - 2¹⁸ = 211110749977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211111012096 and 211111012105.

It is not an unprimeable number, because it can be changed into a prime (211111012171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1115795 + ... + 1291208.

It is an arithmetic number, because the mean of its divisors is an integer number (26573324160).

Almost surely, 2^211111012121 is an apocalyptic number.

It is an amenable number.

211111012121 is a deficient number, since it is larger than the sum of its proper divisors (1475581159).

211111012121 is a wasteful number, since it uses less digits than its factorization.

211111012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407615.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211111012121 its reverse (121210111112), we get a palindrome (332321123233).

The spelling of 211111012121 in words is "two hundred eleven billion, one hundred eleven million, twelve thousand, one hundred twenty-one".