222021311100 has 144 divisors (see below), whose sum is σ = 648521158656. Its totient is φ = 58641408000.

The previous prime is 222021311093. The next prime is 222021311117. The reversal of 222021311100 is 1113120222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222021311100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24417555 + ... + 24426645.

Almost surely, 2^222021311100 is an apocalyptic number.

222021311100 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 222021311100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324260579328).

222021311100 is an abundant number, since it is smaller than the sum of its proper divisors (426499847556).

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

222021311100 is a wasteful number, since it uses less digits than its factorization.

222021311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9876 (or 9869 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 222021311100 its reverse (1113120222), we get a palindrome (223134431322).

The spelling of 222021311100 in words is "two hundred twenty-two billion, twenty-one million, three hundred eleven thousand, one hundred".