221212302001 has 4 divisors (see below), whose sum is σ = 234224790372. Its totient is φ = 208199813632.

The previous prime is 221212301971. The next prime is 221212302013. The reversal of 221212302001 is 100203212122.

It is a happy number.

221212302001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148514661376 + 72697640625 = 385376^2 + 269625^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212302001 - 2⁵ = 221212301969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212302061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6506244160 + ... + 6506244193.

It is an arithmetic number, because the mean of its divisors is an integer number (58556197593).

Almost surely, 2^221212302001 is an apocalyptic number.

It is an amenable number.

221212302001 is a deficient number, since it is larger than the sum of its proper divisors (13012488371).

221212302001 is a wasteful number, since it uses less digits than its factorization.

221212302001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13012488370.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221212302001 its reverse (100203212122), we get a palindrome (321415514123).

The spelling of 221212302001 in words is "two hundred twenty-one billion, two hundred twelve million, three hundred two thousand, one".