1222345100 has 36 divisors (see below), whose sum is σ = 2662631664. Its totient is φ = 487068480.

The previous prime is 1222345093. The next prime is 1222345123. The reversal of 1222345100 is 15432221.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 11 ways as a sum of consecutive naturals, for example, 3062 + ... + 49538.

Almost surely, 2^1222345100 is an apocalyptic number.

1222345100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222345100 is an abundant number, since it is smaller than the sum of its proper divisors (1440286564).

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

1222345100 is a wasteful number, since it uses less digits than its factorization.

1222345100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46754 (or 46747 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1222345100 is about 34962.0522852993. The cubic root of 1222345100 is about 1069.2139392243.

Adding to 1222345100 its reverse (15432221), we get a palindrome (1237777321).

The spelling of 1222345100 in words is "one billion, two hundred twenty-two million, three hundred forty-five thousand, one hundred".