211221112002111 has 6 divisors (see below), whose sum is σ = 305097161780840. Its totient is φ = 140814074668068.

The previous prime is 211221112002071. The next prime is 211221112002133. The reversal of 211221112002111 is 111200211122112.

It is a happy number.

211221112002111 is a `hidden beast` number, since 21 + 1 + 221 + 11 + 200 + 211 + 1 = 666.

It is not a de Polignac number, because 211221112002111 - 2²⁹ = 211220575131199 is a prime.

It is a super-2 number, since 2×211221112002111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221112002151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11734506222331 + ... + 11734506222348.

Almost surely, 2^{211221112002111} is an apocalyptic number.

211221112002111 is a deficient number, since it is larger than the sum of its proper divisors (93876049778729).

211221112002111 is a wasteful number, since it uses less digits than its factorization.

211221112002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23469012444685 (or 23469012444682 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211221112002111 its reverse (111200211122112), we get a palindrome (322421323124223).

The spelling of 211221112002111 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twelve million, two thousand, one hundred eleven".