1316332021 has 4 divisors (see below), whose sum is σ = 1373563872. Its totient is φ = 1259100172.

The previous prime is 1316331917. The next prime is 1316332037. The reversal of 1316332021 is 1202336131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1316332021 - 2⁷ = 1316331893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1316331983 and 1316332001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316338021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28615891 + ... + 28615936.

It is an arithmetic number, because the mean of its divisors is an integer number (343390968).

Almost surely, 2^1316332021 is an apocalyptic number.

It is an amenable number.

1316332021 is a deficient number, since it is larger than the sum of its proper divisors (57231851).

1316332021 is an equidigital number, since it uses as much as digits as its factorization.

1316332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57231850.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1316332021 is about 36281.2902333972. The cubic root of 1316332021 is about 1095.9442994429.

Adding to 1316332021 its reverse (1202336131), we get a palindrome (2518668152).

The spelling of 1316332021 in words is "one billion, three hundred sixteen million, three hundred thirty-two thousand, twenty-one".