1311031011100 has 72 divisors (see below), whose sum is σ = 2943334270800. Its totient is φ = 506278348800.

The previous prime is 1311031011091. The next prime is 1311031011113. The reversal of 1311031011100 is 11101301131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42704556 + ... + 42735244.

It is an arithmetic number, because the mean of its divisors is an integer number (40879642650).

Almost surely, 2^{1311031011100} is an apocalyptic number.

1311031011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311031011100 is an abundant number, since it is smaller than the sum of its proper divisors (1632303259700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311031011100 is a wasteful number, since it uses less digits than its factorization.

1311031011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45463 (or 45456 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 13.

Adding to 1311031011100 its reverse (11101301131), we get a palindrome (1322132312231).

The spelling of 1311031011100 in words is "one trillion, three hundred eleven billion, thirty-one million, eleven thousand, one hundred".