123011203133 has 12 divisors (see below), whose sum is σ = 154101947580. Its totient is φ = 97327544832.

The previous prime is 123011203129. The next prime is 123011203157. The reversal of 123011203133 is 331302110321.

It can be written as a sum of positive squares in 2 ways, for example, as 76146746809 + 46864456324 = 275947^2 + 216482^2 .

It is not a de Polignac number, because 123011203133 - 2² = 123011203129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011203103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96554468 + ... + 96555741.

It is an arithmetic number, because the mean of its divisors is an integer number (12841828965).

Almost surely, 2^123011203133 is an apocalyptic number.

123011203133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123011203133 is a deficient number, since it is larger than the sum of its proper divisors (31090744447).

123011203133 is a wasteful number, since it uses less digits than its factorization.

123011203133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193110236 (or 193110229 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123011203133 its reverse (331302110321), we get a palindrome (454313313454).

The spelling of 123011203133 in words is "one hundred twenty-three billion, eleven million, two hundred three thousand, one hundred thirty-three".