12221112121210 has 16 divisors (see below), whose sum is σ = 22199818350600. Its totient is φ = 4843596730176.

The previous prime is 12221112121199. The next prime is 12221112121241. The reversal of 12221112121210 is 1212121112221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12147476414329 + 73635706881 = 3485323^2 + 271359^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5606013645 + ... + 5606015824.

Almost surely, 2^{12221112121210} is an apocalyptic number.

12221112121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221112121210 is a deficient number, since it is larger than the sum of its proper divisors (9978706229390).

12221112121210 is a wasteful number, since it uses less digits than its factorization.

12221112121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11212029585.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12221112121210 its reverse (1212121112221), we get a palindrome (13433233233431).

The spelling of 12221112121210 in words is "twelve trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred ten".