331220221101 has 36 divisors (see below), whose sum is σ = 607134662784. Its totient is φ = 172062450000.

The previous prime is 331220221037. The next prime is 331220221103. The reversal of 331220221101 is 101122022133.

331220221101 is a `hidden beast` number, since 331 + 220 + 2 + 2 + 110 + 1 = 666.

It is not a de Polignac number, because 331220221101 - 2⁶ = 331220221037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331220221103) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34134525 + ... + 34144226.

It is an arithmetic number, because the mean of its divisors is an integer number (16864851744).

Almost surely, 2^331220221101 is an apocalyptic number.

It is an amenable number.

331220221101 is a deficient number, since it is larger than the sum of its proper divisors (275914441683).

331220221101 is a wasteful number, since it uses less digits than its factorization.

331220221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68278782 (or 68278772 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 331220221101 its reverse (101122022133), we get a palindrome (432342243234).

The spelling of 331220221101 in words is "three hundred thirty-one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred one".