100242201221 has 2 divisors, whose sum is σ = 100242201222. Its totient is φ = 100242201220.

The previous prime is 100242201203. The next prime is 100242201223. The reversal of 100242201221 is 122102242001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73923628321 + 26318572900 = 271889^2 + 162230^2 .

It is a cyclic number.

It is not a de Polignac number, because 100242201221 - 2¹⁴ = 100242184837 is a prime.

Together with 100242201223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100242201221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100242201223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50121100610 + 50121100611.

It is an arithmetic number, because the mean of its divisors is an integer number (50121100611).

Almost surely, 2^100242201221 is an apocalyptic number.

It is an amenable number.

100242201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100242201221 is an equidigital number, since it uses as much as digits as its factorization.

100242201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 100242201221 its reverse (122102242001), we get a palindrome (222344443222).

The spelling of 100242201221 in words is "one hundred billion, two hundred forty-two million, two hundred one thousand, two hundred twenty-one".