2021222211100 has 72 divisors (see below), whose sum is σ = 4532490558288. Its totient is φ = 781867968000.

The previous prime is 2021222211089. The next prime is 2021222211181. The reversal of 2021222211100 is 11122221202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1892689 + ... + 2761288.

It is an arithmetic number, because the mean of its divisors is an integer number (62951257754).

Almost surely, 2^{2021222211100} is an apocalyptic number.

2021222211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021222211100 is an abundant number, since it is smaller than the sum of its proper divisors (2511268347188).

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

2021222211100 is a wasteful number, since it uses less digits than its factorization.

2021222211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654135 (or 4654128 counting only the distinct ones).

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

Adding to 2021222211100 its reverse (11122221202), we get a palindrome (2032344432302).

It can be divided in two parts, 2021222 and 211100, that added together give a palindrome (2232322).

The spelling of 2021222211100 in words is "two trillion, twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred".