1311331212103 has 4 divisors (see below), whose sum is σ = 1430543140488. Its totient is φ = 1192119283720.

The previous prime is 1311331212067. The next prime is 1311331212137. The reversal of 1311331212103 is 3012121331131.

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 1311331212103 - 2³³ = 1302741277511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311331210103) 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, 59605964176 + ... + 59605964197.

It is an arithmetic number, because the mean of its divisors is an integer number (357635785122).

Almost surely, 2^{1311331212103} is an apocalyptic number.

1311331212103 is a deficient number, since it is larger than the sum of its proper divisors (119211928385).

1311331212103 is a wasteful number, since it uses less digits than its factorization.

1311331212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119211928384.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1311331212103 its reverse (3012121331131), we get a palindrome (4323452543234).

The spelling of 1311331212103 in words is "one trillion, three hundred eleven billion, three hundred thirty-one million, two hundred twelve thousand, one hundred three".