20210111021101 has 2 divisors, whose sum is σ = 20210111021102. Its totient is φ = 20210111021100.

The previous prime is 20210111021083. The next prime is 20210111021129. The reversal of 20210111021101 is 10112011101202.

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., 18189363480201 + 2020747540900 = 4264899^2 + 1421530^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210111021101 - 2⁵ = 20210111021069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210111021161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105055510550 + 10105055510551.

It is an arithmetic number, because the mean of its divisors is an integer number (10105055510551).

Almost surely, 2^{20210111021101} is an apocalyptic number.

It is an amenable number.

20210111021101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210111021101 is an equidigital number, since it uses as much as digits as its factorization.

20210111021101 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 20210111021101 its reverse (10112011101202), we get a palindrome (30322122122303).

The spelling of 20210111021101 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, twenty-one thousand, one hundred one".