1123001235405 has 24 divisors (see below), whose sum is σ = 2224611971712. Its totient is φ = 513371993184.

The previous prime is 1123001235403. The next prime is 1123001235409. The reversal of 1123001235405 is 5045321003211.

1123001235405 is a `hidden beast` number, since 1 + 1 + 2 + 300 + 1 + 2 + 354 + 0 + 5 = 666.

It is not a de Polignac number, because 1123001235405 - 2¹ = 1123001235403 is a prime.

It is a super-2 number, since 2×1123001235405² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123001235403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1782541329 + ... + 1782541958.

It is an arithmetic number, because the mean of its divisors is an integer number (92692165488).

Almost surely, 2^{1123001235405} is an apocalyptic number.

1123001235405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123001235405 is a deficient number, since it is larger than the sum of its proper divisors (1101610736307).

1123001235405 is a wasteful number, since it uses less digits than its factorization.

1123001235405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565083305 (or 3565083302 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 1123001235405 its reverse (5045321003211), we get a palindrome (6168322238616).

The spelling of 1123001235405 in words is "one trillion, one hundred twenty-three billion, one million, two hundred thirty-five thousand, four hundred five".