221120201022201 has 48 divisors (see below), whose sum is σ = 345400797453712. Its totient is φ = 135505894809600.

The previous prime is 221120201022113. The next prime is 221120201022323. The reversal of 221120201022201 is 102220102021122.

It is a happy number.

221120201022201 is a `hidden beast` number, since 221 + 1 + 20 + 201 + 0 + 2 + 220 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 8932034799801 + 212188166222400 = 2988651^2 + 14566680^2 .

It is not a de Polignac number, because 221120201022201 - 2⁷ = 221120201022073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221120201022401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1512780561 + ... + 1512926721.

Almost surely, 2^{221120201022201} is an apocalyptic number.

It is an amenable number.

221120201022201 is a deficient number, since it is larger than the sum of its proper divisors (124280596431511).

221120201022201 is a wasteful number, since it uses less digits than its factorization.

221120201022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200074 (or 200071 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221120201022201 its reverse (102220102021122), we get a palindrome (323340303043323).

The spelling of 221120201022201 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred one million, twenty-two thousand, two hundred one".