120021002020 has 48 divisors (see below), whose sum is σ = 254102704128. Its totient is φ = 47616508800.

The previous prime is 120021001981. The next prime is 120021002039. The reversal of 120021002020 is 20200120021.

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 = 120021001988 and 120021002006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16635934 + ... + 16643146.

It is an arithmetic number, because the mean of its divisors is an integer number (5293806336).

Almost surely, 2^120021002020 is an apocalyptic number.

120021002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021002020 is an abundant number, since it is smaller than the sum of its proper divisors (134081702108).

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

120021002020 is a wasteful number, since it uses less digits than its factorization.

120021002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13900 (or 13898 counting only the distinct ones).

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

Adding to 120021002020 its reverse (20200120021), we get a palindrome (140221122041).

The spelling of 120021002020 in words is "one hundred twenty billion, twenty-one million, two thousand, twenty".