1311142402123 has 4 divisors (see below), whose sum is σ = 1311146726760. Its totient is φ = 1311138077488.

The previous prime is 1311142402121. The next prime is 1311142402147. The reversal of 1311142402123 is 3212042411131.

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 1311142402123 - 2¹ = 1311142402121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311142402121) 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, 1670218 + ... + 2326351.

It is an arithmetic number, because the mean of its divisors is an integer number (327786681690).

Almost surely, 2^{1311142402123} is an apocalyptic number.

1311142402123 is a deficient number, since it is larger than the sum of its proper divisors (4324637).

1311142402123 is an equidigital number, since it uses as much as digits as its factorization.

1311142402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324636.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1311142402123 its reverse (3212042411131), we get a palindrome (4523184813254).

The spelling of 1311142402123 in words is "one trillion, three hundred eleven billion, one hundred forty-two million, four hundred two thousand, one hundred twenty-three".