1201123133103 has 4 divisors (see below), whose sum is σ = 1601497510808. Its totient is φ = 800748755400.

The previous prime is 1201123133053. The next prime is 1201123133123. The reversal of 1201123133103 is 3013313211021.

It is a happy number.

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

It is not a de Polignac number, because 1201123133103 - 2⁶ = 1201123133039 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 1201123133103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201123133123) 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, 200187188848 + ... + 200187188853.

It is an arithmetic number, because the mean of its divisors is an integer number (400374377702).

Almost surely, 2^{1201123133103} is an apocalyptic number.

1201123133103 is a deficient number, since it is larger than the sum of its proper divisors (400374377705).

1201123133103 is an equidigital number, since it uses as much as digits as its factorization.

1201123133103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400374377704.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1201123133103 its reverse (3013313211021), we get a palindrome (4214436344124).

The spelling of 1201123133103 in words is "one trillion, two hundred one billion, one hundred twenty-three million, one hundred thirty-three thousand, one hundred three".