1001123355 has 32 divisors (see below), whose sum is σ = 1660253760. Its totient is φ = 514519040.

The previous prime is 1001123339. The next prime is 1001123407. The reversal of 1001123355 is 5533211001.

It is not a de Polignac number, because 1001123355 - 2⁴ = 1001123339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256015 + ... + 259895.

It is an arithmetic number, because the mean of its divisors is an integer number (51882930).

Almost surely, 2^1001123355 is an apocalyptic number.

1001123355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001123355 is a deficient number, since it is larger than the sum of its proper divisors (659130405).

1001123355 is a wasteful number, since it uses less digits than its factorization.

1001123355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1001123355 is about 31640.5334183860. The cubic root of 1001123355 is about 1000.3743115401.

Adding to 1001123355 its reverse (5533211001), we get a palindrome (6534334356).

The spelling of 1001123355 in words is "one billion, one million, one hundred twenty-three thousand, three hundred fifty-five".