311322520210421 has 16 divisors (see below), whose sum is σ = 318740426309760. Its totient is φ = 303991506282240.

The previous prime is 311322520210381. The next prime is 311322520210489. The reversal of 311322520210421 is 124012025223113.

It is a cyclic number.

It is not a de Polignac number, because 311322520210421 - 2¹⁸ = 311322519948277 is a prime.

It is a super-2 number, since 2×311322520210421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311322520219421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21052985 + ... + 32647713.

It is an arithmetic number, because the mean of its divisors is an integer number (19921276644360).

Almost surely, 2^{311322520210421} is an apocalyptic number.

It is an amenable number.

311322520210421 is a deficient number, since it is larger than the sum of its proper divisors (7417906099339).

311322520210421 is a wasteful number, since it uses less digits than its factorization.

311322520210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11598476.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 311322520210421 its reverse (124012025223113), we get a palindrome (435334545433534).

The spelling of 311322520210421 in words is "three hundred eleven trillion, three hundred twenty-two billion, five hundred twenty million, two hundred ten thousand, four hundred twenty-one".