21022110020101 has 2 divisors, whose sum is σ = 21022110020102. Its totient is φ = 21022110020100.

The previous prime is 21022110020099. The next prime is 21022110020129. The reversal of 21022110020101 is 10102001122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16949079689476 + 4073030330625 = 4116926^2 + 2018175^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022110020101 - 2¹ = 21022110020099 is a prime.

Together with 21022110020099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022110020141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511055010050 + 10511055010051.

It is an arithmetic number, because the mean of its divisors is an integer number (10511055010051).

Almost surely, 2^{21022110020101} is an apocalyptic number.

It is an amenable number.

21022110020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022110020101 is an equidigital number, since it uses as much as digits as its factorization.

21022110020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022110020101 its reverse (10102001122012), we get a palindrome (31124111142113).

The spelling of 21022110020101 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, twenty thousand, one hundred one".