1320221103131 has 64 divisors (see below), whose sum is σ = 1572307200000. Its totient is φ = 1107904444416.

The previous prime is 1320221103073. The next prime is 1320221103137. The reversal of 1320221103131 is 1313011220231.

It is a happy number.

It is not a de Polignac number, because 1320221103131 - 2³⁰ = 1319147361307 is a prime.

It is a super-2 number, since 2×1320221103131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320221103137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1961695211 + ... + 1961695883.

It is an arithmetic number, because the mean of its divisors is an integer number (24567300000).

Almost surely, 2^{1320221103131} is an apocalyptic number.

1320221103131 is a deficient number, since it is larger than the sum of its proper divisors (252086096869).

1320221103131 is an equidigital number, since it uses as much as digits as its factorization.

1320221103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1320221103131 its reverse (1313011220231), we get a palindrome (2633232323362).

The spelling of 1320221103131 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, one hundred three thousand, one hundred thirty-one".