311434121 has 4 divisors (see below), whose sum is σ = 311714052. Its totient is φ = 311154192.

The previous prime is 311434049. The next prime is 311434129. The reversal of 311434121 is 121434113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121434113 = 73 ⋅1663481.

It can be written as a sum of positive squares in 2 ways, for example, as 9369721 + 302064400 = 3061^2 + 17380^2 .

It is a cyclic number.

It is not a de Polignac number, because 311434121 - 2¹⁰ = 311433097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311434093 and 311434102.

It is not an unprimeable number, because it can be changed into a prime (311434129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138290 + ... + 140523.

It is an arithmetic number, because the mean of its divisors is an integer number (77928513).

Almost surely, 2^311434121 is an apocalyptic number.

It is an amenable number.

311434121 is a deficient number, since it is larger than the sum of its proper divisors (279931).

311434121 is a wasteful number, since it uses less digits than its factorization.

311434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279930.

The product of its digits is 288, while the sum is 20.

The square root of 311434121 is about 17647.4961680121. The cubic root of 311434121 is about 677.8319944377.

Adding to 311434121 its reverse (121434113), we get a palindrome (432868234).

The spelling of 311434121 in words is "three hundred eleven million, four hundred thirty-four thousand, one hundred twenty-one".