1331230111200 has 432 divisors, whose sum is σ = 5422240985616. Its totient is φ = 303738470400.

The previous prime is 1331230111181. The next prime is 1331230111201. The reversal of 1331230111200 is 21110321331.

1331230111200 is a `hidden beast` number, since 1 + 331 + 2 + 301 + 11 + 20 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331230111201) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 852034 + ... + 1840766.

It is an arithmetic number, because the mean of its divisors is an integer number (12551483763).

Almost surely, 2^{1331230111200} is an apocalyptic number.

1331230111200 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 1331230111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2711120492808).

1331230111200 is an abundant number, since it is smaller than the sum of its proper divisors (4091010874416).

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

1331230111200 is a wasteful number, since it uses less digits than its factorization.

1331230111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988787 (or 988771 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1331230111200 its reverse (21110321331), we get a palindrome (1352340432531).

The spelling of 1331230111200 in words is "one trillion, three hundred thirty-one billion, two hundred thirty million, one hundred eleven thousand, two hundred".