221212020001222 has 16 divisors (see below), whose sum is σ = 331973421872400. Its totient is φ = 110554215819552.

The previous prime is 221212020001201. The next prime is 221212020001229. The reversal of 221212020001222 is 222100020212122.

It is a self number, because there is not a number n which added to its sum of digits gives 221212020001222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212020001229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144721404 + ... + 146241952.

It is an arithmetic number, because the mean of its divisors is an integer number (20748338867025).

Almost surely, 2^{221212020001222} is an apocalyptic number.

221212020001222 is a deficient number, since it is larger than the sum of its proper divisors (110761401871178).

221212020001222 is a wasteful number, since it uses less digits than its factorization.

221212020001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554567.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221212020001222 its reverse (222100020212122), we get a palindrome (443312040213344).

The spelling of 221212020001222 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty million, one thousand, two hundred twenty-two".