12221021210 has 64 divisors (see below), whose sum is σ = 22690360224. Its totient is φ = 4737408000.

The previous prime is 12221021207. The next prime is 12221021213. The reversal of 12221021210 is 1212012221.

It is an interprime number because it is at equal distance from previous prime (12221021207) and next prime (12221021213).

It can be written as a sum of positive squares in 16 ways, for example, as 8000050249 + 4220970961 = 89443^2 + 64969^2 .

It is not an unprimeable number, because it can be changed into a prime (12221021213) 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, 18051392 + ... + 18052068.

Almost surely, 2^12221021210 is an apocalyptic number.

12221021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221021210 is a deficient number, since it is larger than the sum of its proper divisors (10469339014).

12221021210 is a wasteful number, since it uses less digits than its factorization.

12221021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12221021210 its reverse (1212012221), we get a palindrome (13433033431).

The spelling of 12221021210 in words is "twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred ten".