21020110022101 has 2 divisors, whose sum is σ = 21020110022102. Its totient is φ = 21020110022100.

The previous prime is 21020110022011. The next prime is 21020110022179. The reversal of 21020110022101 is 10122001102012.

Together with previous prime (21020110022011) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18883326795025 + 2136783227076 = 4345495^2 + 1461774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020110022101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020110022201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510055011050 + 10510055011051.

It is an arithmetic number, because the mean of its divisors is an integer number (10510055011051).

Almost surely, 2^{21020110022101} is an apocalyptic number.

It is an amenable number.

21020110022101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020110022101 is an equidigital number, since it uses as much as digits as its factorization.

21020110022101 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 21020110022101 its reverse (10122001102012), we get a palindrome (31142111124113).

The spelling of 21020110022101 in words is "twenty-one trillion, twenty billion, one hundred ten million, twenty-two thousand, one hundred one".