331021222311121 has 4 divisors (see below), whose sum is σ = 332736358178212. Its totient is φ = 329306086444032.

The previous prime is 331021222311079. The next prime is 331021222311133. The reversal of 331021222311121 is 121113222120133.

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 109036700580096 + 221984521731025 = 10442064^2 + 14899145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331021222311121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331021222311191) 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, 857567933256 + ... + 857567933641.

It is an arithmetic number, because the mean of its divisors is an integer number (83184089544553).

Almost surely, 2^{331021222311121} is an apocalyptic number.

It is an amenable number.

331021222311121 is a deficient number, since it is larger than the sum of its proper divisors (1715135867091).

331021222311121 is a wasteful number, since it uses less digits than its factorization.

331021222311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715135867090.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 331021222311121 its reverse (121113222120133), we get a palindrome (452134444431254).

The spelling of 331021222311121 in words is "three hundred thirty-one trillion, twenty-one billion, two hundred twenty-two million, three hundred eleven thousand, one hundred twenty-one".