111111221153 has 2 divisors, whose sum is σ = 111111221154. Its totient is φ = 111111221152.

The previous prime is 111111221119. The next prime is 111111221219. The reversal of 111111221153 is 351122111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109698739264 + 1412481889 = 331208^2 + 37583^2 .

It is an emirp because it is prime and its reverse (351122111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111111221153 - 2⁸ = 111111220897 is a prime.

It is a super-2 number, since 2×111111221153² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111111227153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555610576 + 55555610577.

It is an arithmetic number, because the mean of its divisors is an integer number (55555610577).

Almost surely, 2^111111221153 is an apocalyptic number.

It is an amenable number.

111111221153 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111221153 is an equidigital number, since it uses as much as digits as its factorization.

111111221153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 20.

Adding to 111111221153 its reverse (351122111111), we get a palindrome (462233332264).

The spelling of 111111221153 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, one hundred fifty-three".