102020012020 has 12 divisors (see below), whose sum is σ = 214242025284. Its totient is φ = 40808004800.

The previous prime is 102020011969. The next prime is 102020012089. The reversal of 102020012020 is 20210020201.

It can be written as a sum of positive squares in 2 ways, for example, as 71500620816 + 30519391204 = 267396^2 + 174698^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 102020011988 and 102020012006.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2550500281 + ... + 2550500320.

It is an arithmetic number, because the mean of its divisors is an integer number (17853502107).

Almost surely, 2^102020012020 is an apocalyptic number.

102020012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102020012020 is an abundant number, since it is smaller than the sum of its proper divisors (112222013264).

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

102020012020 is a wasteful number, since it uses less digits than its factorization.

102020012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101000610 (or 5101000608 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 102020012020 its reverse (20210020201), we get a palindrome (122230032221).

The spelling of 102020012020 in words is "one hundred two billion, twenty million, twelve thousand, twenty".