120020002100 has 18 divisors (see below), whose sum is σ = 260443404774. Its totient is φ = 48008000800.

The previous prime is 120020002097. The next prime is 120020002111. The reversal of 120020002100 is 1200020021.

It can be written as a sum of positive squares in 3 ways, for example, as 2049735076 + 117970267024 = 45274^2 + 343468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 600099911 + ... + 600100110.

It is an arithmetic number, because the mean of its divisors is an integer number (14469078043).

Almost surely, 2^120020002100 is an apocalyptic number.

120020002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120020002100 is an abundant number, since it is smaller than the sum of its proper divisors (140423402674).

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

120020002100 is a wasteful number, since it uses less digits than its factorization.

120020002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200200035 (or 1200200028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 120020002100 its reverse (1200020021), we get a palindrome (121220022121).

The spelling of 120020002100 in words is "one hundred twenty billion, twenty million, two thousand, one hundred".