111555411101 has 2 divisors, whose sum is σ = 111555411102. Its totient is φ = 111555411100.

The previous prime is 111555411059. The next prime is 111555411109. The reversal of 111555411101 is 101114555111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109891587001 + 1663824100 = 331499^2 + 40790^2 .

It is a cyclic number.

It is not a de Polignac number, because 111555411101 - 2¹⁰ = 111555410077 is a prime.

It is a super-2 number, since 2×111555411101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111555411109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55777705550 + 55777705551.

It is an arithmetic number, because the mean of its divisors is an integer number (55777705551).

Almost surely, 2^111555411101 is an apocalyptic number.

It is an amenable number.

111555411101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111555411101 is an equidigital number, since it uses as much as digits as its factorization.

111555411101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500, while the sum is 26.

Adding to 111555411101 its reverse (101114555111), we get a palindrome (212669966212).

The spelling of 111555411101 in words is "one hundred eleven billion, five hundred fifty-five million, four hundred eleven thousand, one hundred one".