220001021201 has 4 divisors (see below), whose sum is σ = 236924176692. Its totient is φ = 203077865712.

The previous prime is 220001021117. The next prime is 220001021209. The reversal of 220001021201 is 102120100022.

It is a happy number.

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 140576254225 + 79424766976 = 374935^2 + 281824^2 .

It is a cyclic number.

It is not a de Polignac number, because 220001021201 - 2³⁰ = 218927279377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220001021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8461577726 + ... + 8461577751.

It is an arithmetic number, because the mean of its divisors is an integer number (59231044173).

Almost surely, 2^220001021201 is an apocalyptic number.

It is an amenable number.

220001021201 is a deficient number, since it is larger than the sum of its proper divisors (16923155491).

220001021201 is a wasteful number, since it uses less digits than its factorization.

220001021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16923155490.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220001021201 its reverse (102120100022), we get a palindrome (322121121223).

The spelling of 220001021201 in words is "two hundred twenty billion, one million, twenty-one thousand, two hundred one".