2121021322200 has 576 divisors, whose sum is σ = 7997425319520. Its totient is φ = 499239936000.

The previous prime is 2121021322187. The next prime is 2121021322213. The reversal of 2121021322200 is 22231201212.

2121021322200 is a `hidden beast` number, since 2 + 121 + 0 + 21 + 322 + 200 = 666.

It is an interprime number because it is at equal distance from previous prime (2121021322187) and next prime (2121021322213).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 381681822 + ... + 381687378.

Almost surely, 2^{2121021322200} is an apocalyptic number.

2121021322200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121021322200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3998712659760).

2121021322200 is an abundant number, since it is smaller than the sum of its proper divisors (5876403997320).

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

2121021322200 is a wasteful number, since it uses less digits than its factorization.

2121021322200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148 (or 6136 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2121021322200 its reverse (22231201212), we get a palindrome (2143252523412).

The spelling of 2121021322200 in words is "two trillion, one hundred twenty-one billion, twenty-one million, three hundred twenty-two thousand, two hundred".