1111242261055 has 4 divisors (see below), whose sum is σ = 1333490713272. Its totient is φ = 888993808840.

The previous prime is 1111242261013. The next prime is 1111242261131. The reversal of 1111242261055 is 5501622421111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1111242261055 - 2⁷ = 1111242260927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111124226101 + ... + 111124226110.

It is an arithmetic number, because the mean of its divisors is an integer number (333372678318).

Almost surely, 2^{1111242261055} is an apocalyptic number.

1111242261055 is a deficient number, since it is larger than the sum of its proper divisors (222248452217).

1111242261055 is an equidigital number, since it uses as much as digits as its factorization.

1111242261055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222248452216.

The product of its (nonzero) digits is 4800, while the sum is 31.

Adding to 1111242261055 its reverse (5501622421111), we get a palindrome (6612864682166).

The spelling of 1111242261055 in words is "one trillion, one hundred eleven billion, two hundred forty-two million, two hundred sixty-one thousand, fifty-five".