101001201221 has 4 divisors (see below), whose sum is σ = 101644521132. Its totient is φ = 100357881312.

The previous prime is 101001201211. The next prime is 101001201229. The reversal of 101001201221 is 122102100101.

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 21611940100 + 79389261121 = 147010^2 + 281761^2 .

It is a cyclic number.

It is not a de Polignac number, because 101001201221 - 2³⁰ = 99927459397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321659720 + ... + 321660033.

It is an arithmetic number, because the mean of its divisors is an integer number (25411130283).

Almost surely, 2^101001201221 is an apocalyptic number.

It is an amenable number.

101001201221 is a deficient number, since it is larger than the sum of its proper divisors (643319911).

101001201221 is an equidigital number, since it uses as much as digits as its factorization.

101001201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643319910.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101001201221 its reverse (122102100101), we get a palindrome (223103301322).

The spelling of 101001201221 in words is "one hundred one billion, one million, two hundred one thousand, two hundred twenty-one".