1222100112 has 20 divisors (see below), whose sum is σ = 3157092080. Its totient is φ = 407366688.

The previous prime is 1222100071. The next prime is 1222100137. The reversal of 1222100112 is 2110012221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12730162 + ... + 12730257.

It is an arithmetic number, because the mean of its divisors is an integer number (157854604).

Almost surely, 2^1222100112 is an apocalyptic number.

1222100112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222100112 is an abundant number, since it is smaller than the sum of its proper divisors (1934991968).

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

1222100112 is a wasteful number, since it uses less digits than its factorization.

1222100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25460430 (or 25460424 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1222100112 is about 34958.5484824528. The cubic root of 1222100112 is about 1069.1425022009.

Adding to 1222100112 its reverse (2110012221), we get a palindrome (3332112333).

The spelling of 1222100112 in words is "one billion, two hundred twenty-two million, one hundred thousand, one hundred twelve".