100211100221021 has 2 divisors, whose sum is σ = 100211100221022. Its totient is φ = 100211100221020.

The previous prime is 100211100221017. The next prime is 100211100221027. The reversal of 100211100221021 is 120122001112001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98755675132921 + 1455425088100 = 9937589^2 + 1206410^2 .

It is a cyclic number.

It is not a de Polignac number, because 100211100221021 - 2² = 100211100221017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100211100220987 and 100211100221005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100211100221027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105550110510 + 50105550110511.

It is an arithmetic number, because the mean of its divisors is an integer number (50105550110511).

Almost surely, 2^{100211100221021} is an apocalyptic number.

It is an amenable number.

100211100221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100211100221021 is an equidigital number, since it uses as much as digits as its factorization.

100211100221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100211100221021 its reverse (120122001112001), we get a palindrome (220333101333022).

The spelling of 100211100221021 in words is "one hundred trillion, two hundred eleven billion, one hundred million, two hundred twenty-one thousand, twenty-one".