21022100101 has 2 divisors, whose sum is σ = 21022100102. Its totient is φ = 21022100100.

The previous prime is 21022100093. The next prime is 21022100161. The reversal of 21022100101 is 10100122012.

It is a Cunningham number, because it is equal to 144990²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21022100100 + 1 = 144990^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022100101 - 2³ = 21022100093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022100161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511050050 + 10511050051.

It is an arithmetic number, because the mean of its divisors is an integer number (10511050051).

Almost surely, 2^21022100101 is an apocalyptic number.

It is an amenable number.

21022100101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022100101 is an equidigital number, since it uses as much as digits as its factorization.

21022100101 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 10.

Adding to 21022100101 its reverse (10100122012), we get a palindrome (31122222113).

The spelling of 21022100101 in words is "twenty-one billion, twenty-two million, one hundred thousand, one hundred one".