20102020901 has 2 divisors, whose sum is σ = 20102020902. Its totient is φ = 20102020900.

The previous prime is 20102020879. The next prime is 20102020903. The reversal of 20102020901 is 10902020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18859528900 + 1242492001 = 137330^2 + 35249^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102020901 - 2³⁰ = 19028279077 is a prime.

Together with 20102020903, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102020901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102020903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051010450 + 10051010451.

It is an arithmetic number, because the mean of its divisors is an integer number (10051010451).

Almost surely, 2^20102020901 is an apocalyptic number.

It is an amenable number.

20102020901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102020901 is an equidigital number, since it uses as much as digits as its factorization.

20102020901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20102020901 in words is "twenty billion, one hundred two million, twenty thousand, nine hundred one".