311330231130121 has 6 divisors (see below), whose sum is σ = 362159656620810. Its totient is φ = 266854483825776.

The previous prime is 311330231130053. The next prime is 311330231130253. The reversal of 311330231130121 is 121031132033113.

It can be written as a sum of positive squares in only one way, i.e., 187595865406096 + 123734365724025 = 13696564^2 + 11123595^2 .

It is not a de Polignac number, because 311330231130121 - 2⁴⁵ = 276145859041289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311330231110121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3176839093116 + ... + 3176839093213.

It is an arithmetic number, because the mean of its divisors is an integer number (60359942770135).

Almost surely, 2^{311330231130121} is an apocalyptic number.

It is an amenable number.

311330231130121 is a deficient number, since it is larger than the sum of its proper divisors (50829425490689).

311330231130121 is an equidigital number, since it uses as much as digits as its factorization.

311330231130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6353678186343 (or 6353678186336 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 311330231130121 its reverse (121031132033113), we get a palindrome (432361363163234).

The spelling of 311330231130121 in words is "three hundred eleven trillion, three hundred thirty billion, two hundred thirty-one million, one hundred thirty thousand, one hundred twenty-one".