311343140121 has 64 divisors (see below), whose sum is σ = 487765152000. Its totient is φ = 174910095360.

The previous prime is 311343140089. The next prime is 311343140161. The reversal of 311343140121 is 121041343113.

It is a happy number.

It is not a de Polignac number, because 311343140121 - 2⁵ = 311343140089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311343140091 and 311343140100.

It is not an unprimeable number, because it can be changed into a prime (311343140161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11181865 + ... + 11209673.

It is an arithmetic number, because the mean of its divisors is an integer number (7621330500).

Almost surely, 2^311343140121 is an apocalyptic number.

It is an amenable number.

311343140121 is a deficient number, since it is larger than the sum of its proper divisors (176422011879).

311343140121 is a wasteful number, since it uses less digits than its factorization.

311343140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28394.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 311343140121 its reverse (121041343113), we get a palindrome (432384483234).

The spelling of 311343140121 in words is "three hundred eleven billion, three hundred forty-three million, one hundred forty thousand, one hundred twenty-one".