2021121001200 has 120 divisors (see below), whose sum is σ = 7399227772288. Its totient is φ = 461970512640.

The previous prime is 2021121001117. The next prime is 2021121001217. The reversal of 2021121001200 is 21001211202.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120296422 + ... + 120313221.

Almost surely, 2^{2021121001200} is an apocalyptic number.

2021121001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021121001200 is an abundant number, since it is smaller than the sum of its proper divisors (5378106771088).

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

2021121001200 is a wasteful number, since it uses less digits than its factorization.

2021121001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240609671 (or 240609660 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021121001200 its reverse (21001211202), we get a palindrome (2042122212402).

The spelling of 2021121001200 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one thousand, two hundred".