311331013220121 has 16 divisors (see below), whose sum is σ = 445200257240640. Its totient is φ = 192920111467200.

The previous prime is 311331013220111. The next prime is 311331013220147. The reversal of 311331013220121 is 121022310133113.

It is not a de Polignac number, because 311331013220121 - 2⁶ = 311331013220057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311331013220091 and 311331013220100.

It is not an unprimeable number, because it can be changed into a prime (311331013220111) 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, 51527804530 + ... + 51527810571.

It is an arithmetic number, because the mean of its divisors is an integer number (27825016077540).

Almost surely, 2^{311331013220121} is an apocalyptic number.

It is an amenable number.

311331013220121 is a deficient number, since it is larger than the sum of its proper divisors (133869244020519).

311331013220121 is a wasteful number, since it uses less digits than its factorization.

311331013220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103055615176.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 311331013220121 its reverse (121022310133113), we get a palindrome (432353323353234).

The spelling of 311331013220121 in words is "three hundred eleven trillion, three hundred thirty-one billion, thirteen million, two hundred twenty thousand, one hundred twenty-one".