221330131211 has 16 divisors (see below), whose sum is σ = 269783027136. Its totient is φ = 177248726016.

The previous prime is 221330131201. The next prime is 221330131219. The reversal of 221330131211 is 112131033122.

It is a happy number.

It is not a de Polignac number, because 221330131211 - 2⁶ = 221330131147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221330131219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6771716 + ... + 6804321.

It is an arithmetic number, because the mean of its divisors is an integer number (16861439196).

Almost surely, 2^221330131211 is an apocalyptic number.

221330131211 is a deficient number, since it is larger than the sum of its proper divisors (48452895925).

221330131211 is a wasteful number, since it uses less digits than its factorization.

221330131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13576198.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221330131211 its reverse (112131033122), we get a palindrome (333461164333).

The spelling of 221330131211 in words is "two hundred twenty-one billion, three hundred thirty million, one hundred thirty-one thousand, two hundred eleven".