1311123203000 has 256 divisors, whose sum is σ = 3371139233280. Its totient is φ = 474336000000.

The previous prime is 1311123202901. The next prime is 1311123203129. The reversal of 1311123203000 is 3023211131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311123203000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214899950 + ... + 214906050.

It is an arithmetic number, because the mean of its divisors is an integer number (13168512630).

Almost surely, 2^{1311123203000} is an apocalyptic number.

1311123203000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311123203000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1685569616640).

1311123203000 is an abundant number, since it is smaller than the sum of its proper divisors (2060016030280).

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

1311123203000 is a wasteful number, since it uses less digits than its factorization.

1311123203000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1311123203000 its reverse (3023211131), we get a palindrome (1314146414131).

The spelling of 1311123203000 in words is "one trillion, three hundred eleven billion, one hundred twenty-three million, two hundred three thousand".