1331220220004 has 12 divisors (see below), whose sum is σ = 2329875102828. Its totient is φ = 665541619200.

The previous prime is 1331220219913. The next prime is 1331220220007. The reversal of 1331220220004 is 4000220221331.

It can be written as a sum of positive squares in 2 ways, for example, as 55224060004 + 1275996160000 = 234998^2 + 1129600^2 .

It is a super-3 number, since 3×1331220220004³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1331220220007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17078957 + ... + 17156724.

It is an arithmetic number, because the mean of its divisors is an integer number (194156258569).

Almost surely, 2^{1331220220004} is an apocalyptic number.

It is an amenable number.

1331220220004 is a deficient number, since it is larger than the sum of its proper divisors (998654882824).

1331220220004 is a wasteful number, since it uses less digits than its factorization.

1331220220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34245406 (or 34245404 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1331220220004 its reverse (4000220221331), we get a palindrome (5331440441335).

The spelling of 1331220220004 in words is "one trillion, three hundred thirty-one billion, two hundred twenty million, two hundred twenty thousand, four".