221212202222001 has 16 divisors (see below), whose sum is σ = 295072230338496. Its totient is φ = 147413499722496.

The previous prime is 221212202221993. The next prime is 221212202222029. The reversal of 221212202222001 is 100222202212122.

It is not a de Polignac number, because 221212202222001 - 2³ = 221212202221993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212202222051) 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, 72947046 + ... + 75919008.

It is an arithmetic number, because the mean of its divisors is an integer number (18442014396156).

Almost surely, 2^{221212202222001} is an apocalyptic number.

It is an amenable number.

221212202222001 is a deficient number, since it is larger than the sum of its proper divisors (73860028116495).

221212202222001 is a wasteful number, since it uses less digits than its factorization.

221212202222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982272.

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

Adding to 221212202222001 its reverse (100222202212122), we get a palindrome (321434404434123).

The spelling of 221212202222001 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred two million, two hundred twenty-two thousand, one".