311130121 has 4 divisors (see below), whose sum is σ = 311165712. Its totient is φ = 311094532.

The previous prime is 311130049. The next prime is 311130133. The reversal of 311130121 is 121031113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121031113 = 7 ⋅17290159.

It is a cyclic number.

It is not a de Polignac number, because 311130121 - 2²⁵ = 277575689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311130191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5370 + ... + 25516.

It is an arithmetic number, because the mean of its divisors is an integer number (77791428).

Almost surely, 2^311130121 is an apocalyptic number.

It is an amenable number.

311130121 is a deficient number, since it is larger than the sum of its proper divisors (35591).

311130121 is a wasteful number, since it uses less digits than its factorization.

311130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35590.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 311130121 is about 17638.8809452301. The cubic root of 311130121 is about 677.6113720587.

Adding to 311130121 its reverse (121031113), we get a palindrome (432161234).

The spelling of 311130121 in words is "three hundred eleven million, one hundred thirty thousand, one hundred twenty-one".