12221124210 has 64 divisors (see below), whose sum is σ = 33048725760. Its totient is φ = 3213060480.

The previous prime is 12221124151. The next prime is 12221124217. The reversal of 12221124210 is 1242112221.

12221124210 is a `hidden beast` number, since 12 + 221 + 12 + 421 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12221124217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299587 + ... + 337926.

It is an arithmetic number, because the mean of its divisors is an integer number (516386340).

Almost surely, 2^12221124210 is an apocalyptic number.

12221124210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221124210 is an abundant number, since it is smaller than the sum of its proper divisors (20827601550).

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

12221124210 is a wasteful number, since it uses less digits than its factorization.

12221124210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637600 (or 637594 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221124210 its reverse (1242112221), we get a palindrome (13463236431).

The spelling of 12221124210 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-four thousand, two hundred ten".