111331212201 has 24 divisors (see below), whose sum is σ = 183058439616. Its totient is φ = 64539831840.

The previous prime is 111331212199. The next prime is 111331212319. The reversal of 111331212201 is 102212133111.

111331212201 is a `hidden beast` number, since 111 + 331 + 2 + 1 + 220 + 1 = 666.

It is not a de Polignac number, because 111331212201 - 2¹ = 111331212199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111331219201) 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, 24444630 + ... + 24449183.

It is an arithmetic number, because the mean of its divisors is an integer number (7627434984).

Almost surely, 2^111331212201 is an apocalyptic number.

111331212201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111331212201 is a deficient number, since it is larger than the sum of its proper divisors (71727227415).

111331212201 is a wasteful number, since it uses less digits than its factorization.

111331212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48893853 (or 48893850 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111331212201 its reverse (102212133111), we get a palindrome (213543345312).

The spelling of 111331212201 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred twelve thousand, two hundred one".