1200113123 has 4 divisors (see below), whose sum is σ = 1309214328. Its totient is φ = 1091011920.

The previous prime is 1200113111. The next prime is 1200113129. The reversal of 1200113123 is 3213110021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200113123 - 2⁶ = 1200113059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200113098 and 1200113107.

It is not an unprimeable number, because it can be changed into a prime (1200113129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54550586 + ... + 54550607.

It is an arithmetic number, because the mean of its divisors is an integer number (327303582).

Almost surely, 2^1200113123 is an apocalyptic number.

1200113123 is a deficient number, since it is larger than the sum of its proper divisors (109101205).

1200113123 is a wasteful number, since it uses less digits than its factorization.

1200113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109101204.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1200113123 is about 34642.6489027615. The cubic root of 1200113123 is about 1062.6919601126.

Adding to 1200113123 its reverse (3213110021), we get a palindrome (4413223144).

The spelling of 1200113123 in words is "one billion, two hundred million, one hundred thirteen thousand, one hundred twenty-three".