2122222122100 has 72 divisors (see below), whose sum is σ = 4631808295296. Its totient is φ = 843990480000.

The previous prime is 2122222122029. The next prime is 2122222122113. The reversal of 2122222122100 is 12212222212.

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, 88153065 + ... + 88177135.

It is an arithmetic number, because the mean of its divisors is an integer number (64330670768).

Almost surely, 2^{2122222122100} is an apocalyptic number.

2122222122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122222122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2315904147648).

2122222122100 is an abundant number, since it is smaller than the sum of its proper divisors (2509586173196).

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

2122222122100 is a wasteful number, since it uses less digits than its factorization.

2122222122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29137 (or 29130 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2122222122100 its reverse (12212222212), we get a palindrome (2134434344312).

The spelling of 2122222122100 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred".