102021212102020 has 24 divisors (see below), whose sum is σ = 214244753073624. Its totient is φ = 40808445286656.

The previous prime is 102021212101999. The next prime is 102021212102027. The reversal of 102021212102020 is 20201212120201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8931287652676 + 93089924449344 = 2988526^2 + 9648312^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102021212101985 and 102021212102003.

It is not an unprimeable number, because it can be changed into a prime (102021212102027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27600402 + ... + 31077718.

It is an arithmetic number, because the mean of its divisors is an integer number (8926864711401).

Almost surely, 2^{102021212102020} is an apocalyptic number.

102021212102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021212102020 is an abundant number, since it is smaller than the sum of its proper divisors (112223540971604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102021212102020 is a wasteful number, since it uses less digits than its factorization.

102021212102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944279 (or 4944277 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102021212102020 its reverse (20201212120201), we get a palindrome (122222424222221).

The spelling of 102021212102020 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, one hundred two thousand, twenty".