102020120020 has 48 divisors (see below), whose sum is σ = 263682776448. Its totient is φ = 32287685760.

The previous prime is 102020119991. The next prime is 102020120021. The reversal of 102020120020 is 20021020201.

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 = 102020119979 and 102020120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020120021) 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 15 ways as a sum of consecutive naturals, for example, 28025686 + ... + 28029325.

It is an arithmetic number, because the mean of its divisors is an integer number (5493391176).

Almost surely, 2^102020120020 is an apocalyptic number.

102020120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102020120020 is an abundant number, since it is smaller than the sum of its proper divisors (161662656428).

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

102020120020 is a wasteful number, since it uses less digits than its factorization.

102020120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56055040 (or 56055038 counting only the distinct ones).

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

Adding to 102020120020 its reverse (20021020201), we get a palindrome (122041140221).

The spelling of 102020120020 in words is "one hundred two billion, twenty million, one hundred twenty thousand, twenty".