111111221201 has 8 divisors (see below), whose sum is σ = 112269105000. Its totient is φ = 109954470400.

The previous prime is 111111221153. The next prime is 111111221219. The reversal of 111111221201 is 102122111111.

It can be written as a sum of positive squares in 4 ways, for example, as 49495570576 + 61615650625 = 222476^2 + 248225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111111221201 - 2³⁴ = 93931352017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111221251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85376 + ... + 479073.

It is an arithmetic number, because the mean of its divisors is an integer number (14033638125).

Almost surely, 2^111111221201 is an apocalyptic number.

It is an amenable number.

111111221201 is a deficient number, since it is larger than the sum of its proper divisors (1157883799).

111111221201 is a wasteful number, since it uses less digits than its factorization.

111111221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566499.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111111221201 its reverse (102122111111), we get a palindrome (213233332312).

The spelling of 111111221201 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, two hundred one".