1200124112403 has 4 divisors (see below), whose sum is σ = 1600165483208. Its totient is φ = 800082741600.

The previous prime is 1200124112399. The next prime is 1200124112417. The reversal of 1200124112403 is 3042114210021.

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

It is not a de Polignac number, because 1200124112403 - 2² = 1200124112399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200124112403.

It is not an unprimeable number, because it can be changed into a prime (1200124112203) 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, 200020685398 + ... + 200020685403.

It is an arithmetic number, because the mean of its divisors is an integer number (400041370802).

Almost surely, 2^{1200124112403} is an apocalyptic number.

1200124112403 is a deficient number, since it is larger than the sum of its proper divisors (400041370805).

1200124112403 is an equidigital number, since it uses as much as digits as its factorization.

1200124112403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400041370804.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1200124112403 its reverse (3042114210021), we get a palindrome (4242238322424).

The spelling of 1200124112403 in words is "one trillion, two hundred billion, one hundred twenty-four million, one hundred twelve thousand, four hundred three".