102020002001 has 4 divisors (see below), whose sum is σ = 102020769792. Its totient is φ = 102019234212.

The previous prime is 102020001961. The next prime is 102020002093. The reversal of 102020002001 is 100200020201.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 100200020201 = 258763 ⋅387227.

It is a cyclic number.

It is not a de Polignac number, because 102020002001 - 2²² = 102015807697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102020002001.

It is not an unprimeable number, because it can be changed into a prime (102020005001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127505 + ... + 469358.

It is an arithmetic number, because the mean of its divisors is an integer number (25505192448).

Almost surely, 2^102020002001 is an apocalyptic number.

It is an amenable number.

102020002001 is a deficient number, since it is larger than the sum of its proper divisors (767791).

102020002001 is an equidigital number, since it uses as much as digits as its factorization.

102020002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767790.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 102020002001 its reverse (100200020201), we get a palindrome (202220022202).

The spelling of 102020002001 in words is "one hundred two billion, twenty million, two thousand, one".