111221012201 has 4 divisors (see below), whose sum is σ = 119776474692. Its totient is φ = 102665549712.

The previous prime is 111221012191. The next prime is 111221012233. The reversal of 111221012201 is 102210122111.

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 63991291225 + 47229720976 = 252965^2 + 217324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221012201 is a prime.

It is a super-3 number, since 3×111221012201³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221012261) 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, 4277731226 + ... + 4277731251.

It is an arithmetic number, because the mean of its divisors is an integer number (29944118673).

Almost surely, 2^111221012201 is an apocalyptic number.

It is an amenable number.

111221012201 is a deficient number, since it is larger than the sum of its proper divisors (8555462491).

111221012201 is an equidigital number, since it uses as much as digits as its factorization.

111221012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555462490.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111221012201 its reverse (102210122111), we get a palindrome (213431134312).

The spelling of 111221012201 in words is "one hundred eleven billion, two hundred twenty-one million, twelve thousand, two hundred one".