311212133321321 has 32 divisors (see below), whose sum is σ = 323803142732160. Its totient is φ = 298749249078784.

The previous prime is 311212133321269. The next prime is 311212133321333. The reversal of 311212133321321 is 123123331212113.

It is a de Polignac number, because none of the positive numbers 2^k-311212133321321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212133321021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13185266906 + ... + 13185290508.

It is an arithmetic number, because the mean of its divisors is an integer number (10118848210380).

Almost surely, 2^{311212133321321} is an apocalyptic number.

It is an amenable number.

311212133321321 is a deficient number, since it is larger than the sum of its proper divisors (12591009410839).

311212133321321 is a wasteful number, since it uses less digits than its factorization.

311212133321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26665.

The product of its digits is 3888, while the sum is 29.

Adding to 311212133321321 its reverse (123123331212113), we get a palindrome (434335464533434).

The spelling of 311212133321321 in words is "three hundred eleven trillion, two hundred twelve billion, one hundred thirty-three million, three hundred twenty-one thousand, three hundred twenty-one".