220120021201 has 4 divisors (see below), whose sum is σ = 220162446900. Its totient is φ = 220077595504.

The previous prime is 220120021189. The next prime is 220120021207. The reversal of 220120021201 is 102120021022.

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 142488130576 + 77631890625 = 377476^2 + 278625^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120021201 - 2²¹ = 220117924049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220120021207) 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, 21205066 + ... + 21215443.

It is an arithmetic number, because the mean of its divisors is an integer number (55040611725).

Almost surely, 2^220120021201 is an apocalyptic number.

It is an amenable number.

220120021201 is a deficient number, since it is larger than the sum of its proper divisors (42425699).

220120021201 is an equidigital number, since it uses as much as digits as its factorization.

220120021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42425698.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220120021201 its reverse (102120021022), we get a palindrome (322240042223).

The spelling of 220120021201 in words is "two hundred twenty billion, one hundred twenty million, twenty-one thousand, two hundred one".