311342121 has 6 divisors (see below), whose sum is σ = 449716410. Its totient is φ = 207561408.

The previous prime is 311342107. The next prime is 311342123. The reversal of 311342121 is 121243113.

311342121 is a `hidden beast` number, since 311 + 342 + 12 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 251666496 + 59675625 = 15864^2 + 7725^2 .

It is not a de Polignac number, because 311342121 - 2¹³ = 311333929 is a prime.

It is a super-3 number, since 3×311342121³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311342094 and 311342103.

It is not an unprimeable number, because it can be changed into a prime (311342123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17296776 + ... + 17296793.

It is an arithmetic number, because the mean of its divisors is an integer number (74952735).

Almost surely, 2^311342121 is an apocalyptic number.

It is an amenable number.

311342121 is a deficient number, since it is larger than the sum of its proper divisors (138374289).

311342121 is a wasteful number, since it uses less digits than its factorization.

311342121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34593575 (or 34593572 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 311342121 is about 17644.8893734135. The cubic root of 311342121 is about 677.7652422946.

Adding to 311342121 its reverse (121243113), we get a palindrome (432585234).

The spelling of 311342121 in words is "three hundred eleven million, three hundred forty-two thousand, one hundred twenty-one".