1123101155505 has 48 divisors (see below), whose sum is σ = 2095609268160. Its totient is φ = 512124294528.

The previous prime is 1123101155459. The next prime is 1123101155507. The reversal of 1123101155505 is 5055511013211.

It is not a de Polignac number, because 1123101155505 - 2⁶ = 1123101155441 is a prime.

It is a super-2 number, since 2×1123101155505² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1123101155507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1632675 + ... + 2216264.

It is an arithmetic number, because the mean of its divisors is an integer number (43658526420).

Almost surely, 2^{1123101155505} is an apocalyptic number.

1123101155505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123101155505 is a deficient number, since it is larger than the sum of its proper divisors (972508112655).

1123101155505 is a wasteful number, since it uses less digits than its factorization.

1123101155505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849358 (or 3849351 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 30.

Adding to 1123101155505 its reverse (5055511013211), we get a palindrome (6178612168716).

The spelling of 1123101155505 in words is "one trillion, one hundred twenty-three billion, one hundred one million, one hundred fifty-five thousand, five hundred five".