311440030323421 has 16 divisors (see below), whose sum is σ = 325204719609600. Its totient is φ = 297694051777408.

The previous prime is 311440030323391. The next prime is 311440030323437. The reversal of 311440030323421 is 124323030044113.

It is not a de Polignac number, because 311440030323421 - 2²⁹ = 311439493452509 is a prime.

It is a super-2 number, since 2×311440030323421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311440030323481) 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, 231983520 + ... + 233322166.

It is an arithmetic number, because the mean of its divisors is an integer number (20325294975600).

Almost surely, 2^{311440030323421} is an apocalyptic number.

It is an amenable number.

311440030323421 is a deficient number, since it is larger than the sum of its proper divisors (13764689286179).

311440030323421 is a wasteful number, since it uses less digits than its factorization.

311440030323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345628.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 311440030323421 its reverse (124323030044113), we get a palindrome (435763060367534).

The spelling of 311440030323421 in words is "three hundred eleven trillion, four hundred forty billion, thirty million, three hundred twenty-three thousand, four hundred twenty-one".