100212323221 has 2 divisors, whose sum is σ = 100212323222. Its totient is φ = 100212323220.

The previous prime is 100212323209. The next prime is 100212323249. The reversal of 100212323221 is 122323212001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61994028196 + 38218295025 = 248986^2 + 195495^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212323221 - 2⁹ = 100212322709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100212323251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50106161610 + 50106161611.

It is an arithmetic number, because the mean of its divisors is an integer number (50106161611).

Almost surely, 2^100212323221 is an apocalyptic number.

It is an amenable number.

100212323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100212323221 is an equidigital number, since it uses as much as digits as its factorization.

100212323221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 100212323221 its reverse (122323212001), we get a palindrome (222535535222).

The spelling of 100212323221 in words is "one hundred billion, two hundred twelve million, three hundred twenty-three thousand, two hundred twenty-one".