2021121100212 has 96 divisors (see below), whose sum is σ = 5300455480320. Its totient is φ = 596301108480.

The previous prime is 2021121100171. The next prime is 2021121100213. The reversal of 2021121100212 is 2120011211202.

It is a junction number, because it is equal to n+sod(n) for n = 2021121100191 and 2021121100200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021121100213) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4256089 + ... + 4707072.

It is an arithmetic number, because the mean of its divisors is an integer number (55213077920).

Almost surely, 2^{2021121100212} is an apocalyptic number.

It is an amenable number.

2021121100212 is an abundant number, since it is smaller than the sum of its proper divisors (3279334380108).

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

2021121100212 is a wasteful number, since it uses less digits than its factorization.

2021121100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963253 (or 8963251 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2021121100212 its reverse (2120011211202), we get a palindrome (4141132311414).

The spelling of 2021121100212 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred twelve".