331222001111221 has 4 divisors (see below), whose sum is σ = 361333092121344. Its totient is φ = 301110910101100.

The previous prime is 331222001111207. The next prime is 331222001111227. The reversal of 331222001111221 is 122111100222133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 331222001111221 - 2⁹ = 331222001110709 is a prime.

It is a super-2 number, since 2×331222001111221² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331222001111192 and 331222001111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331222001111227) 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, 15055545505045 + ... + 15055545505066.

It is an arithmetic number, because the mean of its divisors is an integer number (90333273030336).

Almost surely, 2^{331222001111221} is an apocalyptic number.

It is an amenable number.

331222001111221 is a deficient number, since it is larger than the sum of its proper divisors (30111091010123).

331222001111221 is a wasteful number, since it uses less digits than its factorization.

331222001111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30111091010122.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 331222001111221 its reverse (122111100222133), we get a palindrome (453333101333354).

The spelling of 331222001111221 in words is "three hundred thirty-one trillion, two hundred twenty-two billion, one million, one hundred eleven thousand, two hundred twenty-one".