100202210221 has 2 divisors, whose sum is σ = 100202210222. Its totient is φ = 100202210220.

The previous prime is 100202210209. The next prime is 100202210233. The reversal of 100202210221 is 122012202001.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (100202210209) and next prime (100202210233).

It can be written as a sum of positive squares in only one way, i.e., 78559681225 + 21642528996 = 280285^2 + 147114^2 .

It is a cyclic number.

It is not a de Polignac number, because 100202210221 - 2⁵ = 100202210189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100202210261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50101105110 + 50101105111.

It is an arithmetic number, because the mean of its divisors is an integer number (50101105111).

Almost surely, 2^100202210221 is an apocalyptic number.

It is an amenable number.

100202210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100202210221 is an equidigital number, since it uses as much as digits as its factorization.

100202210221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100202210221 its reverse (122012202001), we get a palindrome (222214412222).

The spelling of 100202210221 in words is "one hundred billion, two hundred two million, two hundred ten thousand, two hundred twenty-one".