202102102020101 has 2 divisors, whose sum is σ = 202102102020102. Its totient is φ = 202102102020100.

The previous prime is 202102102020061. The next prime is 202102102020163. The reversal of 202102102020101 is 101020201201202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168022543447201 + 34079558572900 = 12962351^2 + 5837770^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102102020101 - 2⁶ = 202102102020037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202102102070101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051051010050 + 101051051010051.

It is an arithmetic number, because the mean of its divisors is an integer number (101051051010051).

Almost surely, 2^{202102102020101} is an apocalyptic number.

It is an amenable number.

202102102020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102102020101 is an equidigital number, since it uses as much as digits as its factorization.

202102102020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202102102020101 its reverse (101020201201202), we get a palindrome (303122303221303).

The spelling of 202102102020101 in words is "two hundred two trillion, one hundred two billion, one hundred two million, twenty thousand, one hundred one".