111221001205 has 8 divisors (see below), whose sum is σ = 134516109312. Its totient is φ = 88276195728.

The previous prime is 111221001187. The next prime is 111221001209. The reversal of 111221001205 is 502100122111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221001205 is a prime.

It is a super-2 number, since 2×111221001205² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221001209) 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, 87574957 + ... + 87576226.

It is an arithmetic number, because the mean of its divisors is an integer number (16814513664).

Almost surely, 2^111221001205 is an apocalyptic number.

It is an amenable number.

111221001205 is a deficient number, since it is larger than the sum of its proper divisors (23295108107).

111221001205 is a wasteful number, since it uses less digits than its factorization.

111221001205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175151315.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 111221001205 its reverse (502100122111), we get a palindrome (613321123316).

The spelling of 111221001205 in words is "one hundred eleven billion, two hundred twenty-one million, one thousand, two hundred five".