211112021121 has 16 divisors (see below), whose sum is σ = 294863981184. Its totient is φ = 134098325504.

The previous prime is 211112021089. The next prime is 211112021123. The reversal of 211112021121 is 121120211112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211112021121 - 2⁵ = 211112021089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211112021121.

It is not an unprimeable number, because it can be changed into a prime (211112021123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5934786 + ... + 5970251.

It is an arithmetic number, because the mean of its divisors is an integer number (18428998824).

Almost surely, 2^211112021121 is an apocalyptic number.

It is an amenable number.

211112021121 is a deficient number, since it is larger than the sum of its proper divisors (83751960063).

211112021121 is a wasteful number, since it uses less digits than its factorization.

211112021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11905320.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211112021121 its reverse (121120211112), we get a palindrome (332232232233).

The spelling of 211112021121 in words is "two hundred eleven billion, one hundred twelve million, twenty-one thousand, one hundred twenty-one".