100211222021 has 2 divisors, whose sum is σ = 100211222022. Its totient is φ = 100211222020.

The previous prime is 100211222011. The next prime is 100211222047. The reversal of 100211222021 is 120222112001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66414444100 + 33796777921 = 257710^2 + 183839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100211222021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100211221987 and 100211222005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100211222011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105611010 + 50105611011.

It is an arithmetic number, because the mean of its divisors is an integer number (50105611011).

Almost surely, 2^100211222021 is an apocalyptic number.

It is an amenable number.

100211222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100211222021 is an equidigital number, since it uses as much as digits as its factorization.

100211222021 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 14.

Adding to 100211222021 its reverse (120222112001), we get a palindrome (220433334022).

The spelling of 100211222021 in words is "one hundred billion, two hundred eleven million, two hundred twenty-two thousand, twenty-one".