1311121311000 has 128 divisors (see below), whose sum is σ = 4331327981760. Its totient is φ = 329065728000.

The previous prime is 1311121310999. The next prime is 1311121311007. The reversal of 1311121311000 is 1131211131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311121311007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12803131 + ... + 12905130.

Almost surely, 2^{1311121311000} is an apocalyptic number.

1311121311000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311121311000 is an abundant number, since it is smaller than the sum of its proper divisors (3020206670760).

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

1311121311000 is a wasteful number, since it uses less digits than its factorization.

1311121311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25708302 (or 25708288 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 1311121311000 its reverse (1131211131), we get a palindrome (1312252522131).

The spelling of 1311121311000 in words is "one trillion, three hundred eleven billion, one hundred twenty-one million, three hundred eleven thousand".