12220555530 has 32 divisors (see below), whose sum is σ = 30044685888. Its totient is φ = 3179331200.

The previous prime is 12220555469. The next prime is 12220555531. The reversal of 12220555530 is 3555502221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12220555531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4966476 + ... + 4968935.

It is an arithmetic number, because the mean of its divisors is an integer number (938896434).

Almost surely, 2^12220555530 is an apocalyptic number.

12220555530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12220555530 is an abundant number, since it is smaller than the sum of its proper divisors (17824130358).

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

12220555530 is a wasteful number, since it uses less digits than its factorization.

12220555530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9935462.

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 12220555530 in words is "twelve billion, two hundred twenty million, five hundred fifty-five thousand, five hundred thirty".