111111101022201 has 72 divisors (see below), whose sum is σ = 192582280153440. Its totient is φ = 56612112931584.

The previous prime is 111111101022197. The next prime is 111111101022221. The reversal of 111111101022201 is 102220101111111.

It is not a de Polignac number, because 111111101022201 - 2² = 111111101022197 is a prime.

It is a super-2 number, since 2×111111101022201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111111101022221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 60679891 + ... + 62484168.

It is an arithmetic number, because the mean of its divisors is an integer number (2674753891020).

Almost surely, 2^{111111101022201} is an apocalyptic number.

It is an amenable number.

111111101022201 is a deficient number, since it is larger than the sum of its proper divisors (81471179131239).

111111101022201 is a wasteful number, since it uses less digits than its factorization.

111111101022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123164131 (or 123164105 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111111101022201 its reverse (102220101111111), we get a palindrome (213331202133312).

The spelling of 111111101022201 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred one million, twenty-two thousand, two hundred one".