311455021234121 has 4 divisors (see below), whose sum is σ = 311647158818244. Its totient is φ = 311262883650000.

The previous prime is 311455021234039. The next prime is 311455021234169. The reversal of 311455021234121 is 121432120554113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83014165886521 + 228440855347600 = 9111211^2 + 15114260^2 .

It is a cyclic number.

It is not a de Polignac number, because 311455021234121 - 2³⁰ = 311453947492297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311455021234321) 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, 96068789630 + ... + 96068792871.

It is an arithmetic number, because the mean of its divisors is an integer number (77911789704561).

Almost surely, 2^{311455021234121} is an apocalyptic number.

It is an amenable number.

311455021234121 is a deficient number, since it is larger than the sum of its proper divisors (192137584123).

311455021234121 is a wasteful number, since it uses less digits than its factorization.

311455021234121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192137584122.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 311455021234121 its reverse (121432120554113), we get a palindrome (432887141788234).

The spelling of 311455021234121 in words is "three hundred eleven trillion, four hundred fifty-five billion, twenty-one million, two hundred thirty-four thousand, one hundred twenty-one".