111221001208 has 16 divisors (see below), whose sum is σ = 208595779560. Its totient is φ = 55595460000.

The previous prime is 111221001187. The next prime is 111221001209. The reversal of 111221001208 is 802100122111.

It is a super-2 number, since 2×111221001208² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1848618 + ... + 1907833.

Almost surely, 2^111221001208 is an apocalyptic number.

It is an amenable number.

111221001208 is a deficient number, since it is larger than the sum of its proper divisors (97374778352).

111221001208 is a wasteful number, since it uses less digits than its factorization.

111221001208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760158 (or 3760154 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111221001208 its reverse (802100122111), we get a palindrome (913321123319).

The spelling of 111221001208 in words is "one hundred eleven billion, two hundred twenty-one million, one thousand, two hundred eight".