331221101221011 has 4 divisors (see below), whose sum is σ = 441628134961352. Its totient is φ = 220814067480672.

The previous prime is 331221101221001. The next prime is 331221101221027. The reversal of 331221101221011 is 110122101122133.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 331221101221011 - 2⁷ = 331221101220883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331221101221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55203516870166 + ... + 55203516870171.

It is an arithmetic number, because the mean of its divisors is an integer number (110407033740338).

Almost surely, 2^{331221101221011} is an apocalyptic number.

331221101221011 is a deficient number, since it is larger than the sum of its proper divisors (110407033740341).

331221101221011 is a wasteful number, since it uses less digits than its factorization.

331221101221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110407033740340.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 331221101221011 its reverse (110122101122133), we get a palindrome (441343202343144).

The spelling of 331221101221011 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, eleven".