1331322323220 has 36 divisors (see below), whose sum is σ = 4038344380980. Its totient is φ = 355019286144.

The previous prime is 1331322323209. The next prime is 1331322323231. The reversal of 1331322323220 is 223232231331.

1331322323220 is a `hidden beast` number, since 1 + 3 + 313 + 2 + 2 + 323 + 2 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1331322323209) and next prime (1331322323231).

It can be written as a sum of positive squares in 2 ways, for example, as 210070055556 + 1121252267664 = 458334^2 + 1058892^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3698117385 + ... + 3698117744.

It is an arithmetic number, because the mean of its divisors is an integer number (112176232805).

Almost surely, 2^{1331322323220} is an apocalyptic number.

1331322323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331322323220 is an abundant number, since it is smaller than the sum of its proper divisors (2707022057760).

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

1331322323220 is a wasteful number, since it uses less digits than its factorization.

1331322323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396235144 (or 7396235139 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 1331322323220 its reverse (223232231331), we get a palindrome (1554554554551).

The spelling of 1331322323220 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, two hundred twenty".