102020110101 has 144 divisors (see below), whose sum is σ = 196255113600. Its totient is φ = 49592342016.

The previous prime is 102020110091. The next prime is 102020110147. The reversal of 102020110101 is 101011020201.

It is a happy number.

It is not a de Polignac number, because 102020110101 - 2⁶ = 102020110037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020110001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 21300615 + ... + 21305403.

Almost surely, 2^102020110101 is an apocalyptic number.

It is an amenable number.

102020110101 is a deficient number, since it is larger than the sum of its proper divisors (94235003499).

102020110101 is a wasteful number, since it uses less digits than its factorization.

102020110101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 102020110101 its reverse (101011020201), we get a palindrome (203031130302).

It can be divided in two parts, 1020201 and 10101, that multiplied together give a palindrome (10305050301).

The spelling of 102020110101 in words is "one hundred two billion, twenty million, one hundred ten thousand, one hundred one".