222011100 has 216 divisors, whose sum is σ = 733234320. Its totient is φ = 56125440.

The previous prime is 222011089. The next prime is 222011129. The reversal of 222011100 is 1110222.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1964644 + ... + 1964756.

Almost surely, 2^222011100 is an apocalyptic number.

222011100 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 222011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366617160).

222011100 is an abundant number, since it is smaller than the sum of its proper divisors (511223220).

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

222011100 is a wasteful number, since it uses less digits than its factorization.

222011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 222011100 is about 14900.0369127060. The cubic root of 222011100 is about 605.5149862312.

Adding to 222011100 its reverse (1110222), we get a palindrome (223121322).

It can be divided in two parts, 222011 and 100, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 222011100 in words is "two hundred twenty-two million, eleven thousand, one hundred".