210001120220221 has 12 divisors (see below), whose sum is σ = 231130999219932. Its totient is φ = 190659241784000.

The previous prime is 210001120220219. The next prime is 210001120220257. The reversal of 210001120220221 is 122022021100012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7965456314596 + 202035663905625 = 2822314^2 + 14213925^2 .

It is not a de Polignac number, because 210001120220221 - 2¹ = 210001120220219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210001120220195 and 210001120220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001120220291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1140214390 + ... + 1140398551.

It is an arithmetic number, because the mean of its divisors is an integer number (19260916601661).

Almost surely, 2^{210001120220221} is an apocalyptic number.

It is an amenable number.

210001120220221 is a deficient number, since it is larger than the sum of its proper divisors (21129878999711).

210001120220221 is a wasteful number, since it uses less digits than its factorization.

210001120220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280613724 (or 2280613713 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210001120220221 its reverse (122022021100012), we get a palindrome (332023141320233).

The spelling of 210001120220221 in words is "two hundred ten trillion, one billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".