200120001020 has 48 divisors (see below), whose sum is σ = 424806681600. Its totient is φ = 79184884800.

The previous prime is 200120001013. The next prime is 200120001023. The reversal of 200120001020 is 20100021002.

200120001020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 200120000989 and 200120001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120001023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583151 + ... + 860409.

It is an arithmetic number, because the mean of its divisors is an integer number (8850139200).

Almost surely, 2^200120001020 is an apocalyptic number.

200120001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200120001020 is an abundant number, since it is smaller than the sum of its proper divisors (224686680580).

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

200120001020 is a wasteful number, since it uses less digits than its factorization.

200120001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277658 (or 277656 counting only the distinct ones).

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

Adding to 200120001020 its reverse (20100021002), we get a palindrome (220220022022).

The spelling of 200120001020 in words is "two hundred billion, one hundred twenty million, one thousand, twenty".