101020201221 has 4 divisors (see below), whose sum is σ = 134693601632. Its totient is φ = 67346800812.

The previous prime is 101020201151. The next prime is 101020201223. The reversal of 101020201221 is 122102020101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122102020101 = 3 ⋅40700673367.

It is not a de Polignac number, because 101020201221 - 2¹⁵ = 101020168453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101020201197 and 101020201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020201223) 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, 16836700201 + ... + 16836700206.

It is an arithmetic number, because the mean of its divisors is an integer number (33673400408).

Almost surely, 2^101020201221 is an apocalyptic number.

It is an amenable number.

101020201221 is a deficient number, since it is larger than the sum of its proper divisors (33673400411).

101020201221 is an equidigital number, since it uses as much as digits as its factorization.

101020201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33673400410.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101020201221 its reverse (122102020101), we get a palindrome (223122221322).

The spelling of 101020201221 in words is "one hundred one billion, twenty million, two hundred one thousand, two hundred twenty-one".