102020010101 has 2 divisors, whose sum is σ = 102020010102. Its totient is φ = 102020010100.

The previous prime is 102020010097. The next prime is 102020010119. The reversal of 102020010101 is 101010020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81068895076 + 20951115025 = 284726^2 + 144745^2 .

It is an emirp because it is prime and its reverse (101010020201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102020010101 - 2² = 102020010097 is a prime.

It is a super-2 number, since 2×102020010101² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020010151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010005050 + 51010005051.

It is an arithmetic number, because the mean of its divisors is an integer number (51010005051).

Almost surely, 2^102020010101 is an apocalyptic number.

It is an amenable number.

102020010101 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020010101 is an equidigital number, since it uses as much as digits as its factorization.

102020010101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 102020010101 its reverse (101010020201), we get a palindrome (203030030302).

It can be divided in two parts, 1020200 and 10101, that added together give a palindrome (1030301).

The spelling of 102020010101 in words is "one hundred two billion, twenty million, ten thousand, one hundred one".