111221011201 has 4 divisors (see below), whose sum is σ = 111379672404. Its totient is φ = 111062350000.

The previous prime is 111221011183. The next prime is 111221011241. The reversal of 111221011201 is 102110122111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104457593601 + 6763417600 = 323199^2 + 82240^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221011201 - 2¹⁷ = 111220880129 is a prime.

It is a super-2 number, since 2×111221011201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221011241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79329550 + ... + 79330951.

It is an arithmetic number, because the mean of its divisors is an integer number (27844918101).

Almost surely, 2^111221011201 is an apocalyptic number.

It is an amenable number.

111221011201 is a deficient number, since it is larger than the sum of its proper divisors (158661203).

111221011201 is an equidigital number, since it uses as much as digits as its factorization.

111221011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158661202.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111221011201 its reverse (102110122111), we get a palindrome (213331133312).

The spelling of 111221011201 in words is "one hundred eleven billion, two hundred twenty-one million, eleven thousand, two hundred one".