221221231041 has 16 divisors (see below), whose sum is σ = 302187757824. Its totient is φ = 143887561344.

The previous prime is 221221231037. The next prime is 221221231057. The reversal of 221221231041 is 140132122122.

It is a happy number.

It is not a de Polignac number, because 221221231041 - 2² = 221221231037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221221230999 and 221221231017.

It is not an unprimeable number, because it can be changed into a prime (221221231241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2429980 + ... + 2519373.

It is an arithmetic number, because the mean of its divisors is an integer number (18886734864).

Almost surely, 2^221221231041 is an apocalyptic number.

It is an amenable number.

221221231041 is a deficient number, since it is larger than the sum of its proper divisors (80966526783).

221221231041 is a wasteful number, since it uses less digits than its factorization.

221221231041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949720.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221221231041 its reverse (140132122122), we get a palindrome (361353353163).

The spelling of 221221231041 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-one thousand, forty-one".