102020010200021 has 8 divisors (see below), whose sum is σ = 102038231559384. Its totient is φ = 102001789797120.

The previous prime is 102020010200011. The next prime is 102020010200029. The reversal of 102020010200021 is 120002010020201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26956604400625 + 75063405799396 = 5191975^2 + 8663914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102020010200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020010199975 and 102020010200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020010200029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233195735 + ... + 233632811.

It is an arithmetic number, because the mean of its divisors is an integer number (12754778944923).

Almost surely, 2^{102020010200021} is an apocalyptic number.

It is an amenable number.

102020010200021 is a deficient number, since it is larger than the sum of its proper divisors (18221359363).

102020010200021 is an equidigital number, since it uses as much as digits as its factorization.

102020010200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478231.

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

Adding to 102020010200021 its reverse (120002010020201), we get a palindrome (222022020220222).

The spelling of 102020010200021 in words is "one hundred two trillion, twenty billion, ten million, two hundred thousand, twenty-one".