1121554055 has 4 divisors (see below), whose sum is σ = 1345864872. Its totient is φ = 897243240.

The previous prime is 1121554019. The next prime is 1121554067. The reversal of 1121554055 is 5504551211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5504551211 = 2843 ⋅1936177.

It is not a de Polignac number, because 1121554055 - 2¹⁸ = 1121291911 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, 112155401 + ... + 112155410.

It is an arithmetic number, because the mean of its divisors is an integer number (336466218).

Almost surely, 2^1121554055 is an apocalyptic number.

1121554055 is a deficient number, since it is larger than the sum of its proper divisors (224310817).

1121554055 is an equidigital number, since it uses as much as digits as its factorization.

1121554055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224310816.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1121554055 is about 33489.6111503254. The cubic root of 1121554055 is about 1038.9789210879.

The spelling of 1121554055 in words is "one billion, one hundred twenty-one million, five hundred fifty-four thousand, fifty-five".