1331211331 has 12 divisors (see below), whose sum is σ = 1423200064. Its totient is φ = 1243821600.

The previous prime is 1331211317. The next prime is 1331211373. The reversal of 1331211331 is 1331121331.

It is not a de Polignac number, because 1331211331 - 2⁹ = 1331210819 is a prime.

It is a super-2 number, since 2×1331211331² = 3544247215565583122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331211299 and 1331211308.

It is not an unprimeable number, because it can be changed into a prime (1331211311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541 + ... + 51601.

Almost surely, 2^1331211331 is an apocalyptic number.

1331211331 is a deficient number, since it is larger than the sum of its proper divisors (91988733).

1331211331 is an equidigital number, since it uses as much as digits as its factorization.

1331211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51150 (or 51121 counting only the distinct ones).

The product of its digits is 162, while the sum is 19.

The square root of 1331211331 is about 36485.7688832235. The cubic root of 1331211331 is about 1100.0582148254.

Adding to 1331211331 its reverse (1331121331), we get a palindrome (2662332662).

Subtracting from 1331211331 its reverse (1331121331), we obtain a square (90000 = 300²).

The spelling of 1331211331 in words is "one billion, three hundred thirty-one million, two hundred eleven thousand, three hundred thirty-one".