1123203220101 has 40 divisors (see below), whose sum is σ = 1776743008920. Its totient is φ = 704686252032.

The previous prime is 1123203220019. The next prime is 1123203220121. The reversal of 1123203220101 is 1010223023211.

1123203220101 is a `hidden beast` number, since 1 + 12 + 320 + 322 + 0 + 10 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17708689476 + 1105494530625 = 133074^2 + 1051425^2 .

It is not a de Polignac number, because 1123203220101 - 2³⁰ = 1122129478277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123203220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16623855 + ... + 16691283.

It is an arithmetic number, because the mean of its divisors is an integer number (44418575223).

Almost surely, 2^{1123203220101} is an apocalyptic number.

It is an amenable number.

1123203220101 is a deficient number, since it is larger than the sum of its proper divisors (653539788819).

1123203220101 is a wasteful number, since it uses less digits than its factorization.

1123203220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79555 (or 79546 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1123203220101 its reverse (1010223023211), we get a palindrome (2133426243312).

The spelling of 1123203220101 in words is "one trillion, one hundred twenty-three billion, two hundred three million, two hundred twenty thousand, one hundred one".