101221222010221 has 4 divisors (see below), whose sum is σ = 107175411540252. Its totient is φ = 95267032480192.

The previous prime is 101221222010219. The next prime is 101221222010287. The reversal of 101221222010221 is 122010222122101.

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 75668338550025 + 25552883460196 = 8698755^2 + 5054986^2 .

It is a cyclic number.

It is not a de Polignac number, because 101221222010221 - 2¹ = 101221222010219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221222010291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2977094764990 + ... + 2977094765023.

It is an arithmetic number, because the mean of its divisors is an integer number (26793852885063).

Almost surely, 2^{101221222010221} is an apocalyptic number.

It is an amenable number.

101221222010221 is a deficient number, since it is larger than the sum of its proper divisors (5954189530031).

101221222010221 is an equidigital number, since it uses as much as digits as its factorization.

101221222010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954189530030.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 101221222010221 its reverse (122010222122101), we get a palindrome (223231444132322).

The spelling of 101221222010221 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred twenty-two million, ten thousand, two hundred twenty-one".