2101220120200 has 48 divisors (see below), whose sum is σ = 5042928303360. Its totient is φ = 813375528000.

The previous prime is 2101220120189. The next prime is 2101220120201. The reversal of 2101220120200 is 20210221012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2101220120201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169447036 + ... + 169459435.

It is an arithmetic number, because the mean of its divisors is an integer number (105061006320).

Almost surely, 2^{2101220120200} is an apocalyptic number.

2101220120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101220120200 is an abundant number, since it is smaller than the sum of its proper divisors (2941708183160).

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

2101220120200 is a wasteful number, since it uses less digits than its factorization.

2101220120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338906518 (or 338906509 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2101220120200 its reverse (20210221012), we get a palindrome (2121430341212).

The spelling of 2101220120200 in words is "two trillion, one hundred one billion, two hundred twenty million, one hundred twenty thousand, two hundred".