331220221111 has 8 divisors (see below), whose sum is σ = 356719935824. Its totient is φ = 305723540160.

The previous prime is 331220221103. The next prime is 331220221141. The reversal of 331220221111 is 111122022133.

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 331220221111 - 2³ = 331220221103 is a prime.

It is a super-4 number, since 4×331220221111⁴ (a number of 47 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331220221141) 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, 529110 + ... + 970771.

It is an arithmetic number, because the mean of its divisors is an integer number (44589991978).

Almost surely, 2^331220221111 is an apocalyptic number.

331220221111 is a deficient number, since it is larger than the sum of its proper divisors (25499714713).

331220221111 is a wasteful number, since it uses less digits than its factorization.

331220221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516881.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 331220221111 its reverse (111122022133), we get a palindrome (442342243244).

The spelling of 331220221111 in words is "three hundred thirty-one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred eleven".