1203011663523 has 4 divisors (see below), whose sum is σ = 1604015551368. Its totient is φ = 802007775680.

The previous prime is 1203011663467. The next prime is 1203011663549. The reversal of 1203011663523 is 3253661103021.

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 1203011663523 - 2⁹ = 1203011663011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1203011663573) 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 3 ways as a sum of consecutive naturals, for example, 200501943918 + ... + 200501943923.

It is an arithmetic number, because the mean of its divisors is an integer number (401003887842).

Almost surely, 2^{1203011663523} is an apocalyptic number.

1203011663523 is a deficient number, since it is larger than the sum of its proper divisors (401003887845).

1203011663523 is an equidigital number, since it uses as much as digits as its factorization.

1203011663523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401003887844.

The product of its (nonzero) digits is 19440, while the sum is 33.

Adding to 1203011663523 its reverse (3253661103021), we get a palindrome (4456672766544).

The spelling of 1203011663523 in words is "one trillion, two hundred three billion, eleven million, six hundred sixty-three thousand, five hundred twenty-three".