1111221255 has 16 divisors (see below), whose sum is σ = 1791529344. Its totient is φ = 588126240.

The previous prime is 1111221247. The next prime is 1111221271. The reversal of 1111221255 is 5521221111.

It is not a de Polignac number, because 1111221255 - 2³ = 1111221247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280789 + ... + 284718.

It is an arithmetic number, because the mean of its divisors is an integer number (111970584).

Almost surely, 2^1111221255 is an apocalyptic number.

1111221255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1111221255 is a deficient number, since it is larger than the sum of its proper divisors (680308089).

1111221255 is a wasteful number, since it uses less digits than its factorization.

1111221255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565646.

The product of its digits is 200, while the sum is 21.

The square root of 1111221255 is about 33334.9854507243. The cubic root of 1111221255 is about 1035.7783917877.

Adding to 1111221255 its reverse (5521221111), we get a palindrome (6632442366).

The spelling of 1111221255 in words is "one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred fifty-five".