1311020011 has 8 divisors (see below), whose sum is σ = 1511568864. Its totient is φ = 1113786240.

The previous prime is 1311019999. The next prime is 1311020017. The reversal of 1311020011 is 1100201131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311020011 - 2⁷ = 1311019883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311020011.

It is not an unprimeable number, because it can be changed into a prime (1311020017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827920 + ... + 829501.

It is an arithmetic number, because the mean of its divisors is an integer number (188946108).

Almost surely, 2^1311020011 is an apocalyptic number.

1311020011 is a deficient number, since it is larger than the sum of its proper divisors (200548853).

1311020011 is a wasteful number, since it uses less digits than its factorization.

1311020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657541.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1311020011 is about 36208.0103153984. The cubic root of 1311020011 is about 1094.4680974840.

Adding to 1311020011 its reverse (1100201131), we get a palindrome (2411221142).

The spelling of 1311020011 in words is "one billion, three hundred eleven million, twenty thousand, eleven".