1331222323240 has 64 divisors (see below), whose sum is σ = 3066468451200. Its totient is φ = 519840529152.

The previous prime is 1331222323237. The next prime is 1331222323243. The reversal of 1331222323240 is 423232221331.

It is an interprime number because it is at equal distance from previous prime (1331222323237) and next prime (1331222323243).

It is a junction number, because it is equal to n+sod(n) for n = 1331222323199 and 1331222323208.

It is not an unprimeable number, because it can be changed into a prime (1331222323243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3197421 + ... + 3589699.

It is an arithmetic number, because the mean of its divisors is an integer number (47913569550).

Almost surely, 2^{1331222323240} is an apocalyptic number.

1331222323240 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 1331222323240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533234225600).

1331222323240 is an abundant number, since it is smaller than the sum of its proper divisors (1735246127960).

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

1331222323240 is a wasteful number, since it uses less digits than its factorization.

1331222323240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394306 (or 394302 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1331222323240 its reverse (423232221331), we get a palindrome (1754454544571).

The spelling of 1331222323240 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, two hundred forty".