221212240041 has 64 divisors (see below), whose sum is σ = 330776821760. Its totient is φ = 130581745920.

The previous prime is 221212240037. The next prime is 221212240061. The reversal of 221212240041 is 140042212122.

It is not a de Polignac number, because 221212240041 - 2² = 221212240037 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212240061) 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 63 ways as a sum of consecutive naturals, for example, 86511135 + ... + 86513691.

It is an arithmetic number, because the mean of its divisors is an integer number (5168387840).

Almost surely, 2^221212240041 is an apocalyptic number.

It is an amenable number.

221212240041 is a deficient number, since it is larger than the sum of its proper divisors (109564581719).

221212240041 is a wasteful number, since it uses less digits than its factorization.

221212240041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221212240041 its reverse (140042212122), we get a palindrome (361254452163).

The spelling of 221212240041 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred forty thousand, forty-one".