311322220021 has 8 divisors (see below), whose sum is σ = 311742121824. Its totient is φ = 310902488880.

The previous prime is 311322219991. The next prime is 311322220049. The reversal of 311322220021 is 120022223113.

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 311322220021 - 2¹⁷ = 311322088949 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 (311322226021) 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 7 ways as a sum of consecutive naturals, for example, 3844611 + ... + 3924751.

It is an arithmetic number, because the mean of its divisors is an integer number (38967765228).

Almost surely, 2^311322220021 is an apocalyptic number.

It is an amenable number.

311322220021 is a deficient number, since it is larger than the sum of its proper divisors (419901803).

311322220021 is an equidigital number, since it uses as much as digits as its factorization.

311322220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85331.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 311322220021 its reverse (120022223113), we get a palindrome (431344443134).

The spelling of 311322220021 in words is "three hundred eleven billion, three hundred twenty-two million, two hundred twenty thousand, twenty-one".