111411121557 has 16 divisors (see below), whose sum is σ = 153373409280. Its totient is φ = 71862500400.

The previous prime is 111411121513. The next prime is 111411121559. The reversal of 111411121557 is 755121114111.

It is not a de Polignac number, because 111411121557 - 2⁷ = 111411121429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111411121559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307132 + ... + 563162.

It is an arithmetic number, because the mean of its divisors is an integer number (9585838080).

Almost surely, 2^111411121557 is an apocalyptic number.

It is an amenable number.

111411121557 is a deficient number, since it is larger than the sum of its proper divisors (41962287723).

111411121557 is a wasteful number, since it uses less digits than its factorization.

111411121557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260744.

The product of its digits is 1400, while the sum is 30.

Adding to 111411121557 its reverse (755121114111), we get a palindrome (866532235668).

The spelling of 111411121557 in words is "one hundred eleven billion, four hundred eleven million, one hundred twenty-one thousand, five hundred fifty-seven".