2121201021200 has 60 divisors (see below), whose sum is σ = 5271916015140. Its totient is φ = 819222458880.

The previous prime is 2121201021161. The next prime is 2121201021217. The reversal of 2121201021200 is 21201021212.

It can be written as a sum of positive squares in 6 ways, for example, as 402752698384 + 1718448322816 = 634628^2 + 1310896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91419479 + ... + 91442678.

It is an arithmetic number, because the mean of its divisors is an integer number (87865266919).

Almost surely, 2^{2121201021200} is an apocalyptic number.

2121201021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121201021200 is an abundant number, since it is smaller than the sum of its proper divisors (3150714993940).

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

2121201021200 is a wasteful number, since it uses less digits than its factorization.

2121201021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182862204 (or 182862193 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121201021200 its reverse (21201021212), we get a palindrome (2142402042412).

The spelling of 2121201021200 in words is "two trillion, one hundred twenty-one billion, two hundred one million, twenty-one thousand, two hundred".