331312022221121 has 8 divisors (see below), whose sum is σ = 334307375443080. Its totient is φ = 328317781076992.

The previous prime is 331312022221091. The next prime is 331312022221123. The reversal of 331312022221121 is 121122220213133.

It can be written as a sum of positive squares in 4 ways, for example, as 51129149716225 + 280182872504896 = 7150465^2 + 16738664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331312022221121 - 2³⁰ = 331310948479297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331312022221123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277420916 + ... + 278612613.

It is an arithmetic number, because the mean of its divisors is an integer number (41788421930385).

Almost surely, 2^{331312022221121} is an apocalyptic number.

It is an amenable number.

331312022221121 is a deficient number, since it is larger than the sum of its proper divisors (2995353221959).

331312022221121 is a wasteful number, since it uses less digits than its factorization.

331312022221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556038915.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 331312022221121 its reverse (121122220213133), we get a palindrome (452434242434254).

The spelling of 331312022221121 in words is "three hundred thirty-one trillion, three hundred twelve billion, twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".