1121891255 has 8 divisors (see below), whose sum is σ = 1358852112. Its totient is φ = 889124608.

The previous prime is 1121891249. The next prime is 1121891257. The reversal of 1121891255 is 5521981211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121891255 - 2⁸ = 1121890999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121891257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047962 + ... + 1049031.

It is an arithmetic number, because the mean of its divisors is an integer number (169856514).

Almost surely, 2^1121891255 is an apocalyptic number.

1121891255 is a deficient number, since it is larger than the sum of its proper divisors (236960857).

1121891255 is a wasteful number, since it uses less digits than its factorization.

1121891255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097105.

The product of its digits is 7200, while the sum is 35.

The square root of 1121891255 is about 33494.6451690416. The cubic root of 1121891255 is about 1039.0830351326.

The spelling of 1121891255 in words is "one billion, one hundred twenty-one million, eight hundred ninety-one thousand, two hundred fifty-five".