211223111112 has 96 divisors (see below), whose sum is σ = 648492062400. Its totient is φ = 61571104128.

The previous prime is 211223111101. The next prime is 211223111117. The reversal of 211223111112 is 211111322112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (211223111117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5920788 + ... + 5956355.

It is an arithmetic number, because the mean of its divisors is an integer number (6755125650).

Almost surely, 2^211223111112 is an apocalyptic number.

It is an amenable number.

211223111112 is an abundant number, since it is smaller than the sum of its proper divisors (437268951288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211223111112 is a wasteful number, since it uses less digits than its factorization.

211223111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11877187 (or 11877180 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 211223111112 its reverse (211111322112), we get a palindrome (422334433224).

The spelling of 211223111112 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred eleven thousand, one hundred twelve".