222011121100 has 72 divisors (see below), whose sum is σ = 498524186160. Its totient is φ = 85716852480.

The previous prime is 222011121067. The next prime is 222011121107. The reversal of 222011121100 is 1121110222.

It is not an unprimeable number, because it can be changed into a prime (222011121107) 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, 11976439 + ... + 11994961.

It is an arithmetic number, because the mean of its divisors is an integer number (6923947030).

Almost surely, 2^222011121100 is an apocalyptic number.

222011121100 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 222011121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249262093080).

222011121100 is an abundant number, since it is smaller than the sum of its proper divisors (276513065060).

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

222011121100 is a wasteful number, since it uses less digits than its factorization.

222011121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22699 (or 22692 counting only the distinct ones).

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

Adding to 222011121100 its reverse (1121110222), we get a palindrome (223132231322).

The spelling of 222011121100 in words is "two hundred twenty-two billion, eleven million, one hundred twenty-one thousand, one hundred".