221202021201 has 64 divisors (see below), whose sum is σ = 356332339200. Its totient is φ = 119388790080.

The previous prime is 221202021199. The next prime is 221202021233. The reversal of 221202021201 is 102120202122.

221202021201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221202021201 - 2¹ = 221202021199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221202021281) 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 63 ways as a sum of consecutive naturals, for example, 11219250 + ... + 11238948.

It is an arithmetic number, because the mean of its divisors is an integer number (5567692800).

Almost surely, 2^221202021201 is an apocalyptic number.

221202021201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221202021201 is a deficient number, since it is larger than the sum of its proper divisors (135130317999).

221202021201 is a wasteful number, since it uses less digits than its factorization.

221202021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20154.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221202021201 its reverse (102120202122), we get a palindrome (323322223323).

The spelling of 221202021201 in words is "two hundred twenty-one billion, two hundred two million, twenty-one thousand, two hundred one".