101020100201221 has 4 divisors (see below), whose sum is σ = 101020152674700. Its totient is φ = 101020047727744.

The previous prime is 101020100201213. The next prime is 101020100201299. The reversal of 101020100201221 is 122102001020101.

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 78177674810596 + 22842425390625 = 8841814^2 + 4779375^2 .

It is a cyclic number.

It is not a de Polignac number, because 101020100201221 - 2³ = 101020100201213 is a prime.

It is a super-2 number, since 2×101020100201221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020100201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23234476 + ... + 27237493.

It is an arithmetic number, because the mean of its divisors is an integer number (25255038168675).

Almost surely, 2^{101020100201221} is an apocalyptic number.

It is an amenable number.

101020100201221 is a deficient number, since it is larger than the sum of its proper divisors (52473479).

101020100201221 is an equidigital number, since it uses as much as digits as its factorization.

101020100201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52473478.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101020100201221 its reverse (122102001020101), we get a palindrome (223122101221322).

The spelling of 101020100201221 in words is "one hundred one trillion, twenty billion, one hundred million, two hundred one thousand, two hundred twenty-one".