20321000101 has 2 divisors, whose sum is σ = 20321000102. Its totient is φ = 20321000100.

The previous prime is 20321000093. The next prime is 20321000111. The reversal of 20321000101 is 10100012302.

It is an a-pointer prime, because the next prime (20321000111) can be obtained adding 20321000101 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15787671201 + 4533328900 = 125649^2 + 67330^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321000101 - 2³ = 20321000093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321000111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160500050 + 10160500051.

It is an arithmetic number, because the mean of its divisors is an integer number (10160500051).

Almost surely, 2^20321000101 is an apocalyptic number.

It is an amenable number.

20321000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321000101 is an equidigital number, since it uses as much as digits as its factorization.

20321000101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20321000101 its reverse (10100012302), we get a palindrome (30421012403).

The spelling of 20321000101 in words is "twenty billion, three hundred twenty-one million, one hundred one", and thus it is an aban number.