100211011210021 has 2 divisors, whose sum is σ = 100211011210022. Its totient is φ = 100211011210020.

The previous prime is 100211011209979. The next prime is 100211011210073. The reversal of 100211011210021 is 120012110112001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100211011197025 + 12996 = 10010545^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 100211011210021 - 2¹¹ = 100211011207973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100211011209983 and 100211011210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100211011210091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105505605010 + 50105505605011.

It is an arithmetic number, because the mean of its divisors is an integer number (50105505605011).

Almost surely, 2^{100211011210021} is an apocalyptic number.

It is an amenable number.

100211011210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100211011210021 is an equidigital number, since it uses as much as digits as its factorization.

100211011210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100211011210021 its reverse (120012110112001), we get a palindrome (220223121322022).

The spelling of 100211011210021 in words is "one hundred trillion, two hundred eleven billion, eleven million, two hundred ten thousand, twenty-one".