111211210212201 has 128 divisors (see below), whose sum is σ = 186042305433600. Its totient is φ = 65072749248000.

The previous prime is 111211210212173. The next prime is 111211210212203. The reversal of 111211210212201 is 102212012112111.

It is a happy number.

111211210212201 is a `hidden beast` number, since 1 + 1 + 1 + 211 + 210 + 21 + 220 + 1 = 666.

It is not a de Polignac number, because 111211210212201 - 2¹⁰ = 111211210211177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111211210212203) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 572575035 + ... + 572769231.

It is an arithmetic number, because the mean of its divisors is an integer number (1453455511200).

Almost surely, 2^{111211210212201} is an apocalyptic number.

111211210212201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111211210212201 is a deficient number, since it is larger than the sum of its proper divisors (74831095221399).

111211210212201 is a wasteful number, since it uses less digits than its factorization.

111211210212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194748 (or 194742 counting only the distinct ones).

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

Adding to 111211210212201 its reverse (102212012112111), we get a palindrome (213423222324312).

The spelling of 111211210212201 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred ten million, two hundred twelve thousand, two hundred one".