102020020002101 has 4 divisors (see below), whose sum is σ = 103542706867872. Its totient is φ = 100497333136332.

The previous prime is 102020020002091. The next prime is 102020020002149. The reversal of 102020020002101 is 101200020020201.

It is a happy number.

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 102020020002101 - 2⁶ = 102020020002037 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 (102020020002151) 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, 761343432785 + ... + 761343432918.

It is an arithmetic number, because the mean of its divisors is an integer number (25885676716968).

Almost surely, 2^{102020020002101} is an apocalyptic number.

It is an amenable number.

102020020002101 is a deficient number, since it is larger than the sum of its proper divisors (1522686865771).

102020020002101 is an equidigital number, since it uses as much as digits as its factorization.

102020020002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522686865770.

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

Adding to 102020020002101 its reverse (101200020020201), we get a palindrome (203220040022302).

The spelling of 102020020002101 in words is "one hundred two trillion, twenty billion, twenty million, two thousand, one hundred one".