1331320210020 has 72 divisors (see below), whose sum is σ = 4039335586104. Its totient is φ = 354931020288.

The previous prime is 1331320209991. The next prime is 1331320210081. The reversal of 1331320210020 is 200120231331.

1331320210020 is a `hidden beast` number, since 1 + 331 + 320 + 2 + 10 + 0 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 93192215076 + 1238127994944 = 305274^2 + 1112712^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1331320209975 and 1331320210002.

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, 181279 + ... + 1641798.

Almost surely, 2^{1331320210020} is an apocalyptic number.

1331320210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331320210020 is an abundant number, since it is smaller than the sum of its proper divisors (2708015376084).

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

1331320210020 is a wasteful number, since it uses less digits than its factorization.

1331320210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827149 (or 1827144 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1331320210020 its reverse (200120231331), we get a palindrome (1531440441351).

The spelling of 1331320210020 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred ten thousand, twenty".