202020102101 has 2 divisors, whose sum is σ = 202020102102. Its totient is φ = 202020102100.

The previous prime is 202020102073. The next prime is 202020102127. The reversal of 202020102101 is 101201020202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138793502500 + 63226599601 = 372550^2 + 251449^2 .

It is a cyclic number.

It is not a de Polignac number, because 202020102101 - 2¹⁴ = 202020085717 is a prime.

It is a super-2 number, since 2×202020102101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202020102301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010051050 + 101010051051.

It is an arithmetic number, because the mean of its divisors is an integer number (101010051051).

Almost surely, 2^202020102101 is an apocalyptic number.

It is an amenable number.

202020102101 is a deficient number, since it is larger than the sum of its proper divisors (1).

202020102101 is an equidigital number, since it uses as much as digits as its factorization.

202020102101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202020102101 its reverse (101201020202), we get a palindrome (303221122303).

The spelling of 202020102101 in words is "two hundred two billion, twenty million, one hundred two thousand, one hundred one".