1331121343200 has 144 divisors (see below), whose sum is σ = 4726690972416. Its totient is φ = 322696076800.

The previous prime is 1331121343193. The next prime is 1331121343247. The reversal of 1331121343200 is 23431211331.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 25184232 + ... + 25237031.

It is an arithmetic number, because the mean of its divisors is an integer number (32824242864).

Almost surely, 2^{1331121343200} is an apocalyptic number.

1331121343200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331121343200 is an abundant number, since it is smaller than the sum of its proper divisors (3395569629216).

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

1331121343200 is a wasteful number, since it uses less digits than its factorization.

1331121343200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50421297 (or 50421284 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1331121343200 its reverse (23431211331), we get a palindrome (1354552554531).

The spelling of 1331121343200 in words is "one trillion, three hundred thirty-one billion, one hundred twenty-one million, three hundred forty-three thousand, two hundred".