20102131001 has 2 divisors, whose sum is σ = 20102131002. Its totient is φ = 20102131000.

The previous prime is 20102130989. The next prime is 20102131003. The reversal of 20102131001 is 10013120102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12337877776 + 7764253225 = 111076^2 + 88115^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102131001 - 2¹⁰ = 20102129977 is a prime.

It is a Sophie Germain prime.

Together with 20102131003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20102131003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051065500 + 10051065501.

It is an arithmetic number, because the mean of its divisors is an integer number (10051065501).

Almost surely, 2^20102131001 is an apocalyptic number.

It is an amenable number.

20102131001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102131001 is an equidigital number, since it uses as much as digits as its factorization.

20102131001 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 11.

Adding to 20102131001 its reverse (10013120102), we get a palindrome (30115251103).

The spelling of 20102131001 in words is "twenty billion, one hundred two million, one hundred thirty-one thousand, one".