111211111211153 has 2 divisors, whose sum is σ = 111211111211154. Its totient is φ = 111211111211152.

The previous prime is 111211111211149. The next prime is 111211111211243. The reversal of 111211111211153 is 351112111112111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100215175627009 + 10995935584144 = 10010753^2 + 3316012^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211111211153 - 2² = 111211111211149 is a prime.

It is a super-2 number, since 2×111211111211153² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111211111211653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605555605576 + 55605555605577.

It is an arithmetic number, because the mean of its divisors is an integer number (55605555605577).

Almost surely, 2^{111211111211153} is an apocalyptic number.

It is an amenable number.

111211111211153 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211111211153 is an equidigital number, since it uses as much as digits as its factorization.

111211111211153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 23.

Adding to 111211111211153 its reverse (351112111112111), we get a palindrome (462323222323264).

The spelling of 111211111211153 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred eleven million, two hundred eleven thousand, one hundred fifty-three".