311140320122 has 4 divisors (see below), whose sum is σ = 466710480186. Its totient is φ = 155570160060.

The previous prime is 311140320109. The next prime is 311140320131. The reversal of 311140320122 is 221023041113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221023041113 = 7 ⋅31574720159.

It can be written as a sum of positive squares in only one way, i.e., 261428712601 + 49711607521 = 511301^2 + 222961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311140320094 and 311140320103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77785080029 + ... + 77785080032.

Almost surely, 2^311140320122 is an apocalyptic number.

311140320122 is a deficient number, since it is larger than the sum of its proper divisors (155570160064).

311140320122 is a wasteful number, since it uses less digits than its factorization.

311140320122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155570160063.

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

Adding to 311140320122 its reverse (221023041113), we get a palindrome (532163361235).

The spelling of 311140320122 in words is "three hundred eleven billion, one hundred forty million, three hundred twenty thousand, one hundred twenty-two".