1222204920 has 64 divisors (see below), whose sum is σ = 3744645120. Its totient is φ = 318985344.

The previous prime is 1222204903. The next prime is 1222204927. The reversal of 1222204920 is 294022221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222204927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102712 + ... + 113991.

It is an arithmetic number, because the mean of its divisors is an integer number (58510080).

Almost surely, 2^1222204920 is an apocalyptic number.

1222204920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222204920 is an abundant number, since it is smaller than the sum of its proper divisors (2522440200).

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

1222204920 is a wasteful number, since it uses less digits than its factorization.

1222204920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216764 (or 216760 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1222204920 is about 34960.0474828053. The cubic root of 1222204920 is about 1069.1730647501.

The spelling of 1222204920 in words is "one billion, two hundred twenty-two million, two hundred four thousand, nine hundred twenty".