2021121212200 has 48 divisors (see below), whose sum is σ = 4734977924160. Its totient is φ = 802277112000.

The previous prime is 2021121212113. The next prime is 2021121212219. The reversal of 2021121212200 is 22121211202.

It is a happy number.

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, 38544816 + ... + 38597215.

It is an arithmetic number, because the mean of its divisors is an integer number (98645373420).

Almost surely, 2^{2021121212200} is an apocalyptic number.

2021121212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021121212200 is an abundant number, since it is smaller than the sum of its proper divisors (2713856711960).

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

2021121212200 is a wasteful number, since it uses less digits than its factorization.

2021121212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77142178 (or 77142169 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021121212200 its reverse (22121211202), we get a palindrome (2043242423402).

The spelling of 2021121212200 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred".