331121213211001 has 4 divisors (see below), whose sum is σ = 331121284821604. Its totient is φ = 331121141600400.

The previous prime is 331121213210933. The next prime is 331121213211023. The reversal of 331121213211001 is 100112312121133.

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 94198283136400 + 236922930074601 = 9705580^2 + 15392301^2 .

It is a cyclic number.

It is not a de Polignac number, because 331121213211001 - 2¹¹ = 331121213208953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331121213211031) 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, 28352310 + ... + 38289631.

It is an arithmetic number, because the mean of its divisors is an integer number (82780321205401).

Almost surely, 2^{331121213211001} is an apocalyptic number.

It is an amenable number.

331121213211001 is a deficient number, since it is larger than the sum of its proper divisors (71610603).

331121213211001 is an equidigital number, since it uses as much as digits as its factorization.

331121213211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71610602.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 331121213211001 its reverse (100112312121133), we get a palindrome (431233525332134).

The spelling of 331121213211001 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred thirteen million, two hundred eleven thousand, one".