111212201201211 has 24 divisors (see below), whose sum is σ = 175362600990720. Its totient is φ = 67355513895600.

The previous prime is 111212201201203. The next prime is 111212201201249. The reversal of 111212201201211 is 112102102212111.

It is a happy number.

111212201201211 is a `hidden beast` number, since 1 + 11 + 21 + 220 + 1 + 201 + 211 = 666.

It is not a de Polignac number, because 111212201201211 - 2³ = 111212201201203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212201201281) 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, 381688351 + ... + 381979608.

It is an arithmetic number, because the mean of its divisors is an integer number (7306775041280).

Almost surely, 2^{111212201201211} is an apocalyptic number.

111212201201211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111212201201211 is a deficient number, since it is larger than the sum of its proper divisors (64150399789509).

111212201201211 is a wasteful number, since it uses less digits than its factorization.

111212201201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763669447 (or 763669444 counting only the distinct ones).

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

Adding to 111212201201211 its reverse (112102102212111), we get a palindrome (223314303413322).

The spelling of 111212201201211 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred one million, two hundred one thousand, two hundred eleven".