1200123133 has 6 divisors (see below), whose sum is σ = 1319143742. Its totient is φ = 1091020920.

The previous prime is 1200123131. The next prime is 1200123137. The reversal of 1200123133 is 3313210021.

It can be written as a sum of positive squares in only one way, i.e., 1131515044 + 68608089 = 33638^2 + 8283^2 .

It is not a de Polignac number, because 1200123133 - 2¹ = 1200123131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200123131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4959066 + ... + 4959307.

Almost surely, 2^1200123133 is an apocalyptic number.

It is an amenable number.

1200123133 is a deficient number, since it is larger than the sum of its proper divisors (119020609).

1200123133 is an equidigital number, since it uses as much as digits as its factorization.

1200123133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9918395 (or 9918384 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1200123133 is about 34642.7933775555. The cubic root of 1200123133 is about 1062.6949146999.

Adding to 1200123133 its reverse (3313210021), we get a palindrome (4513333154).

The spelling of 1200123133 in words is "one billion, two hundred million, one hundred twenty-three thousand, one hundred thirty-three".