102001820101 has 4 divisors (see below), whose sum is σ = 102041373600. Its totient is φ = 101962266604.

The previous prime is 102001820069. The next prime is 102001820117. The reversal of 102001820101 is 101028100201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102001820101 - 2⁵ = 102001820069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001820201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19772881 + ... + 19778038.

It is an arithmetic number, because the mean of its divisors is an integer number (25510343400).

Almost surely, 2^102001820101 is an apocalyptic number.

It is an amenable number.

102001820101 is a deficient number, since it is larger than the sum of its proper divisors (39553499).

102001820101 is an equidigital number, since it uses as much as digits as its factorization.

102001820101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39553498.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102001820101 its reverse (101028100201), we get a palindrome (203029920302).

The spelling of 102001820101 in words is "one hundred two billion, one million, eight hundred twenty thousand, one hundred one".