311220011110321 has 4 divisors (see below), whose sum is σ = 311221498894452. Its totient is φ = 311218523326192.

The previous prime is 311220011110319. The next prime is 311220011110451. The reversal of 311220011110321 is 123011110022113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21636787159296 + 289583223951025 = 4651536^2 + 17017145^2 .

It is a cyclic number.

It is not a de Polignac number, because 311220011110321 - 2¹ = 311220011110319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311220011110301) 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, 743578246 + ... + 743996671.

It is an arithmetic number, because the mean of its divisors is an integer number (77805374723613).

Almost surely, 2^{311220011110321} is an apocalyptic number.

It is an amenable number.

311220011110321 is a deficient number, since it is larger than the sum of its proper divisors (1487784131).

311220011110321 is a wasteful number, since it uses less digits than its factorization.

311220011110321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487784130.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 311220011110321 its reverse (123011110022113), we get a palindrome (434231121132434).

The spelling of 311220011110321 in words is "three hundred eleven trillion, two hundred twenty billion, eleven million, one hundred ten thousand, three hundred twenty-one".