1311101023 has 4 divisors (see below), whose sum is σ = 1380106360. Its totient is φ = 1242095688.

The previous prime is 1311101017. The next prime is 1311101069. The reversal of 1311101023 is 3201011131.

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 1311101023 - 2¹³ = 1311092831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311100994 and 1311101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311101093) 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, 34502640 + ... + 34502677.

It is an arithmetic number, because the mean of its divisors is an integer number (345026590).

Almost surely, 2^1311101023 is an apocalyptic number.

1311101023 is a deficient number, since it is larger than the sum of its proper divisors (69005337).

1311101023 is an equidigital number, since it uses as much as digits as its factorization.

1311101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69005336.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1311101023 is about 36209.1290008473. The cubic root of 1311101023 is about 1094.4906405478.

Adding to 1311101023 its reverse (3201011131), we get a palindrome (4512112154).

The spelling of 1311101023 in words is "one billion, three hundred eleven million, one hundred one thousand, twenty-three".