1311450221311 has 8 divisors (see below), whose sum is σ = 1320234216080. Its totient is φ = 1302671680128.

The previous prime is 1311450221239. The next prime is 1311450221369. The reversal of 1311450221311 is 1131220541131.

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 1311450221311 - 2²¹ = 1311448124159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311450221371) 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, 880266 + ... + 1843303.

It is an arithmetic number, because the mean of its divisors is an integer number (165029277010).

Almost surely, 2^{1311450221311} is an apocalyptic number.

1311450221311 is a deficient number, since it is larger than the sum of its proper divisors (8783994769).

1311450221311 is a wasteful number, since it uses less digits than its factorization.

1311450221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726793.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 1311450221311 its reverse (1131220541131), we get a palindrome (2442670762442).

The spelling of 1311450221311 in words is "one trillion, three hundred eleven billion, four hundred fifty million, two hundred twenty-one thousand, three hundred eleven".