1313123311011 has 4 divisors (see below), whose sum is σ = 1750831081352. Its totient is φ = 875415540672.

The previous prime is 1313123311007. The next prime is 1313123311013. The reversal of 1313123311011 is 1101133213131.

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

It is not a de Polignac number, because 1313123311011 - 2² = 1313123311007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313123311013) 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, 218853885166 + ... + 218853885171.

It is an arithmetic number, because the mean of its divisors is an integer number (437707770338).

Almost surely, 2^{1313123311011} is an apocalyptic number.

1313123311011 is a deficient number, since it is larger than the sum of its proper divisors (437707770341).

1313123311011 is an equidigital number, since it uses as much as digits as its factorization.

1313123311011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437707770340.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 1313123311011 its reverse (1101133213131), we get a palindrome (2414256524142).

The spelling of 1313123311011 in words is "one trillion, three hundred thirteen billion, one hundred twenty-three million, three hundred eleven thousand, eleven".