102020101020221 has 4 divisors (see below), whose sum is σ = 102282363491100. Its totient is φ = 101757838549344.

The previous prime is 102020101020151. The next prime is 102020101020239. The reversal of 102020101020221 is 122020101020201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26292425332996 + 75727675687225 = 5127614^2 + 8702165^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020101020221 - 2³⁰ = 102019027278397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020101020196 and 102020101020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020101020251) 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, 131131234856 + ... + 131131235633.

It is an arithmetic number, because the mean of its divisors is an integer number (25570590872775).

Almost surely, 2^{102020101020221} is an apocalyptic number.

It is an amenable number.

102020101020221 is a deficient number, since it is larger than the sum of its proper divisors (262262470879).

102020101020221 is an equidigital number, since it uses as much as digits as its factorization.

102020101020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262262470878.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102020101020221 its reverse (122020101020201), we get a palindrome (224040202040422).

The spelling of 102020101020221 in words is "one hundred two trillion, twenty billion, one hundred one million, twenty thousand, two hundred twenty-one".