1311021324200 has 192 divisors, whose sum is σ = 3554250192000. Its totient is φ = 440396835840.

The previous prime is 1311021324149. The next prime is 1311021324271. The reversal of 1311021324200 is 24231201131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54821846 + ... + 54845754.

It is an arithmetic number, because the mean of its divisors is an integer number (18511719750).

Almost surely, 2^{1311021324200} is an apocalyptic number.

1311021324200 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 1311021324200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777125096000).

1311021324200 is an abundant number, since it is smaller than the sum of its proper divisors (2243228867800).

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

1311021324200 is a wasteful number, since it uses less digits than its factorization.

1311021324200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24724 (or 24715 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1311021324200 its reverse (24231201131), we get a palindrome (1335252525331).

The spelling of 1311021324200 in words is "one trillion, three hundred eleven billion, twenty-one million, three hundred twenty-four thousand, two hundred".