2021121201200 has 120 divisors (see below), whose sum is σ = 4870086346608. Its totient is φ = 806063063040.

The previous prime is 2021121201139. The next prime is 2021121201241. The reversal of 2021121201200 is 21021211202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381556952 + ... + 381562248.

Almost surely, 2^{2021121201200} is an apocalyptic number.

2021121201200 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 2021121201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2435043173304).

2021121201200 is an abundant number, since it is smaller than the sum of its proper divisors (2848965145408).

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

2021121201200 is a wasteful number, since it uses less digits than its factorization.

2021121201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7951 (or 7940 counting only the distinct ones).

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

Adding to 2021121201200 its reverse (21021211202), we get a palindrome (2042142412402).

The spelling of 2021121201200 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two hundred one thousand, two hundred".