311201121 has 16 divisors (see below), whose sum is σ = 517321728. Its totient is φ = 161662800.

The previous prime is 311201087. The next prime is 311201129. The reversal of 311201121 is 121102113.

It is not a de Polignac number, because 311201121 - 2²³ = 302812513 is a prime.

It is a super-2 number, since 2×311201121² = 193692275423313282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 311201097 and 311201106.

It is not an unprimeable number, because it can be changed into a prime (311201129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673365 + ... + 673826.

It is an arithmetic number, because the mean of its divisors is an integer number (32332608).

Almost surely, 2^311201121 is an apocalyptic number.

It is an amenable number.

311201121 is a deficient number, since it is larger than the sum of its proper divisors (206120607).

311201121 is a wasteful number, since it uses less digits than its factorization.

311201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347212.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 311201121 is about 17640.8934297558. The cubic root of 311201121 is about 677.6629118540.

Adding to 311201121 its reverse (121102113), we get a palindrome (432303234).

The spelling of 311201121 in words is "three hundred eleven million, two hundred one thousand, one hundred twenty-one".