221212240022 has 16 divisors (see below), whose sum is σ = 334048408800. Its totient is φ = 109862913600.

The previous prime is 221212239991. The next prime is 221212240027. The reversal of 221212240022 is 220042212122.

It is a junction number, because it is equal to n+sod(n) for n = 221212239976 and 221212240003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212240027) 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 7 ways as a sum of consecutive naturals, for example, 3718004 + ... + 3777032.

It is an arithmetic number, because the mean of its divisors is an integer number (20878025550).

Almost surely, 2^221212240022 is an apocalyptic number.

221212240022 is a deficient number, since it is larger than the sum of its proper divisors (112836168778).

221212240022 is a wasteful number, since it uses less digits than its factorization.

221212240022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71591.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221212240022 its reverse (220042212122), we get a palindrome (441254452144).

The spelling of 221212240022 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred forty thousand, twenty-two".