111212201211 has 8 divisors (see below), whose sum is σ = 148756683600. Its totient is φ = 73904593152.

The previous prime is 111212201197. The next prime is 111212201273. The reversal of 111212201211 is 112102212111.

It is a happy number.

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

It is not a de Polignac number, because 111212201211 - 2⁷ = 111212201083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212201291) 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, 59217486 + ... + 59219363.

It is an arithmetic number, because the mean of its divisors is an integer number (18594585450).

Almost surely, 2^111212201211 is an apocalyptic number.

111212201211 is a deficient number, since it is larger than the sum of its proper divisors (37544482389).

111212201211 is a wasteful number, since it uses less digits than its factorization.

111212201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118437165.

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

Adding to 111212201211 its reverse (112102212111), we get a palindrome (223314413322).

The spelling of 111212201211 in words is "one hundred eleven billion, two hundred twelve million, two hundred one thousand, two hundred eleven".