2121320220200 has 24 divisors (see below), whose sum is σ = 4932069512430. Its totient is φ = 848528088000.

The previous prime is 2121320220193. The next prime is 2121320220209. The reversal of 2121320220200 is 20220231212.

It can be written as a sum of positive squares in 3 ways, for example, as 1700744623876 + 420575596324 = 1304126^2 + 648518^2 .

It is not an unprimeable number, because it can be changed into a prime (2121320220209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5303300351 + ... + 5303300750.

Almost surely, 2^{2121320220200} is an apocalyptic number.

2121320220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121320220200 is an abundant number, since it is smaller than the sum of its proper divisors (2810749292230).

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

2121320220200 is a wasteful number, since it uses less digits than its factorization.

2121320220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606601117 (or 10606601108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2121320220200 its reverse (20220231212), we get a palindrome (2141540451412).

The spelling of 2121320220200 in words is "two trillion, one hundred twenty-one billion, three hundred twenty million, two hundred twenty thousand, two hundred".