1320421015331 has 32 divisors (see below), whose sum is σ = 1512553789440. Its totient is φ = 1141649913600.

The previous prime is 1320421015261. The next prime is 1320421015367. The reversal of 1320421015331 is 1335101240231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320421015331 is a prime.

It is a super-2 number, since 2×1320421015331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320421015331.

It is not an unprimeable number, because it can be changed into a prime (1320421015931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96423521 + ... + 96437213.

It is an arithmetic number, because the mean of its divisors is an integer number (47267305920).

Almost surely, 2^{1320421015331} is an apocalyptic number.

1320421015331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320421015331 is a deficient number, since it is larger than the sum of its proper divisors (192132774109).

1320421015331 is a wasteful number, since it uses less digits than its factorization.

1320421015331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18587.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 1320421015331 its reverse (1335101240231), we get a palindrome (2655522255562).

The spelling of 1320421015331 in words is "one trillion, three hundred twenty billion, four hundred twenty-one million, fifteen thousand, three hundred thirty-one".