1203103111331 has 4 divisors (see below), whose sum is σ = 1312476121464. Its totient is φ = 1093730101200.

The previous prime is 1203103111297. The next prime is 1203103111337. The reversal of 1203103111331 is 1331113013021.

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

It is a de Polignac number, because none of the positive numbers 2^k-1203103111331 is a prime.

It is a super-2 number, since 2×1203103111331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203103111337) 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, 54686505050 + ... + 54686505071.

It is an arithmetic number, because the mean of its divisors is an integer number (328119030366).

Almost surely, 2^{1203103111331} is an apocalyptic number.

1203103111331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1203103111331 is a deficient number, since it is larger than the sum of its proper divisors (109373010133).

1203103111331 is a wasteful number, since it uses less digits than its factorization.

1203103111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109373010132.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1203103111331 its reverse (1331113013021), we get a palindrome (2534216124352).

The spelling of 1203103111331 in words is "one trillion, two hundred three billion, one hundred three million, one hundred eleven thousand, three hundred thirty-one".