111212143211 has 24 divisors (see below), whose sum is σ = 123306805440. Its totient is φ = 100212093696.

The previous prime is 111212143169. The next prime is 111212143219. The reversal of 111212143211 is 112341212111.

It is a happy number.

It is not a de Polignac number, because 111212143211 - 2¹⁰ = 111212142187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212143219) 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, 3071831 + ... + 3107823.

It is an arithmetic number, because the mean of its divisors is an integer number (5137783560).

Almost surely, 2^111212143211 is an apocalyptic number.

111212143211 is a deficient number, since it is larger than the sum of its proper divisors (12094662229).

111212143211 is a wasteful number, since it uses less digits than its factorization.

111212143211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36455 (or 36442 counting only the distinct ones).

The product of its digits is 96, while the sum is 20.

Adding to 111212143211 its reverse (112341212111), we get a palindrome (223553355322).

The spelling of 111212143211 in words is "one hundred eleven billion, two hundred twelve million, one hundred forty-three thousand, two hundred eleven".