202111133123 has 4 divisors (see below), whose sum is σ = 202315080768. Its totient is φ = 201907185480.

The previous prime is 202111133117. The next prime is 202111133137. The reversal of 202111133123 is 321331111202.

It is a happy number.

202111133123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202111133123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202111133095 and 202111133104.

It is not an unprimeable number, because it can be changed into a prime (202111139123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101972336 + ... + 101974317.

It is an arithmetic number, because the mean of its divisors is an integer number (50578770192).

Almost surely, 2^202111133123 is an apocalyptic number.

202111133123 is a deficient number, since it is larger than the sum of its proper divisors (203947645).

202111133123 is an equidigital number, since it uses as much as digits as its factorization.

202111133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203947644.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 202111133123 its reverse (321331111202), we get a palindrome (523442244325).

The spelling of 202111133123 in words is "two hundred two billion, one hundred eleven million, one hundred thirty-three thousand, one hundred twenty-three".