1321010311 has 8 divisors (see below), whose sum is σ = 1339616880. Its totient is φ = 1302505728.

The previous prime is 1321010293. The next prime is 1321010333. The reversal of 1321010311 is 1130101231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321010311 - 2⁹ = 1321009799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321010291 and 1321010300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321010111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780 + ... + 51406.

It is an arithmetic number, because the mean of its divisors is an integer number (167452110).

Almost surely, 2^1321010311 is an apocalyptic number.

1321010311 is a deficient number, since it is larger than the sum of its proper divisors (18606569).

1321010311 is an equidigital number, since it uses as much as digits as its factorization.

1321010311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50993.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1321010311 is about 36345.7055372433. The cubic root of 1321010311 is about 1097.2411058013.

Adding to 1321010311 its reverse (1130101231), we get a palindrome (2451111542).

The spelling of 1321010311 in words is "one billion, three hundred twenty-one million, ten thousand, three hundred eleven".