221212221221201 has 8 divisors (see below), whose sum is σ = 255268471645824. Its totient is φ = 187769596930560.

The previous prime is 221212221221197. The next prime is 221212221221207. The reversal of 221212221221201 is 102122122212122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221212221221201 - 2² = 221212221221197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212221221207) 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, 153406532720 + ... + 153406534161.

It is an arithmetic number, because the mean of its divisors is an integer number (31908558955728).

Almost surely, 2^{221212221221201} is an apocalyptic number.

It is an amenable number.

221212221221201 is a deficient number, since it is larger than the sum of its proper divisors (34056250424623).

221212221221201 is a wasteful number, since it uses less digits than its factorization.

221212221221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306813066991.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221212221221201 its reverse (102122122212122), we get a palindrome (323334343433323).

The spelling of 221212221221201 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred one".