222111122100 has 144 divisors (see below), whose sum is σ = 754297638528. Its totient is φ = 49396124160.

The previous prime is 222111122099. The next prime is 222111122113. The reversal of 222111122100 is 1221111222.

It is a super-2 number, since 2×222111122100² (a number of 23 digits) contains 22 as substring.

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 222111122100.

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, 1351587 + ... + 1506986.

Almost surely, 2^222111122100 is an apocalyptic number.

222111122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111122100 is an abundant number, since it is smaller than the sum of its proper divisors (532186516428).

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

222111122100 is a wasteful number, since it uses less digits than its factorization.

222111122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858634 (or 2858627 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222111122100 its reverse (1221111222), we get a palindrome (223332233322).

It can be divided in two parts, 222111122 and 100, that added together give a palindrome (222111222).

The spelling of 222111122100 in words is "two hundred twenty-two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred".