1312111101203 has 4 divisors (see below), whose sum is σ = 1499555544240. Its totient is φ = 1124666658168.

The previous prime is 1312111101157. The next prime is 1312111101211. The reversal of 1312111101203 is 3021011112131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312111101203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312111151203) 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, 93722221508 + ... + 93722221521.

It is an arithmetic number, because the mean of its divisors is an integer number (374888886060).

Almost surely, 2^{1312111101203} is an apocalyptic number.

1312111101203 is a deficient number, since it is larger than the sum of its proper divisors (187444443037).

1312111101203 is an equidigital number, since it uses as much as digits as its factorization.

1312111101203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187444443036.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1312111101203 its reverse (3021011112131), we get a palindrome (4333122213334).

The spelling of 1312111101203 in words is "one trillion, three hundred twelve billion, one hundred eleven million, one hundred one thousand, two hundred three".