1331214021 has 24 divisors (see below), whose sum is σ = 1995817824. Its totient is φ = 886703760.

The previous prime is 1331214011. The next prime is 1331214047. The reversal of 1331214021 is 1204121331.

It is not a de Polignac number, because 1331214021 - 2⁷ = 1331213893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331213985 and 1331214003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331214011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 467815 + ... + 470651.

It is an arithmetic number, because the mean of its divisors is an integer number (83159076).

Almost surely, 2^1331214021 is an apocalyptic number.

It is an amenable number.

1331214021 is a deficient number, since it is larger than the sum of its proper divisors (664603803).

1331214021 is an equidigital number, since it uses as much as digits as its factorization.

1331214021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783 (or 4771 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1331214021 is about 36485.8057468929. The cubic root of 1331214021 is about 1100.0589557933.

Adding to 1331214021 its reverse (1204121331), we get a palindrome (2535335352).

The spelling of 1331214021 in words is "one billion, three hundred thirty-one million, two hundred fourteen thousand, twenty-one".