2021212101100 has 72 divisors (see below), whose sum is σ = 4391041108160. Its totient is φ = 807561861120.

The previous prime is 2021212101079. The next prime is 2021212101107. The reversal of 2021212101100 is 11012121202.

It is not an unprimeable number, because it can be changed into a prime (2021212101107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515744941 + ... + 515748859.

Almost surely, 2^{2021212101100} is an apocalyptic number.

2021212101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021212101100 is an abundant number, since it is smaller than the sum of its proper divisors (2369829007060).

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

2021212101100 is a wasteful number, since it uses less digits than its factorization.

2021212101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8507 (or 8500 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021212101100 its reverse (11012121202), we get a palindrome (2032224222302).

The spelling of 2021212101100 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred one thousand, one hundred".