1320221111331 has 16 divisors (see below), whose sum is σ = 1854018714240. Its totient is φ = 833339298240.

The previous prime is 1320221111299. The next prime is 1320221111333. The reversal of 1320221111331 is 1331111220231.

It is not a de Polignac number, because 1320221111331 - 2⁵ = 1320221111299 is a prime.

It is a super-2 number, since 2×1320221111331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1320221111298 and 1320221111307.

It is not an unprimeable number, because it can be changed into a prime (1320221111333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6631065 + ... + 6827258.

It is an arithmetic number, because the mean of its divisors is an integer number (115876169640).

Almost surely, 2^{1320221111331} is an apocalyptic number.

1320221111331 is a deficient number, since it is larger than the sum of its proper divisors (533797602909).

1320221111331 is a wasteful number, since it uses less digits than its factorization.

1320221111331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13460066.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1320221111331 its reverse (1331111220231), we get a palindrome (2651332331562).

The spelling of 1320221111331 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, one hundred eleven thousand, three hundred thirty-one".