111215021201 has 4 divisors (see below), whose sum is σ = 111344492400. Its totient is φ = 111085550004.

The previous prime is 111215021191. The next prime is 111215021219. The reversal of 111215021201 is 102120512111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111215021201 is a prime.

It is a super-3 number, since 3×111215021201³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111215021201.

It is not an unprimeable number, because it can be changed into a prime (111215021221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64734311 + ... + 64736028.

It is an arithmetic number, because the mean of its divisors is an integer number (27836123100).

Almost surely, 2^111215021201 is an apocalyptic number.

It is an amenable number.

111215021201 is a deficient number, since it is larger than the sum of its proper divisors (129471199).

111215021201 is an equidigital number, since it uses as much as digits as its factorization.

111215021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129471198.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 111215021201 its reverse (102120512111), we get a palindrome (213335533312).

The spelling of 111215021201 in words is "one hundred eleven billion, two hundred fifteen million, twenty-one thousand, two hundred one".