12222221210 has 8 divisors (see below), whose sum is σ = 21999998196. Its totient is φ = 4888888480.

The previous prime is 12222221171. The next prime is 12222221227. The reversal of 12222221210 is 1212222221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11243845369 + 978375841 = 106037^2 + 31279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611111051 + ... + 611111070.

Almost surely, 2^12222221210 is an apocalyptic number.

12222221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12222221210 is a deficient number, since it is larger than the sum of its proper divisors (9777776986).

12222221210 is a wasteful number, since it uses less digits than its factorization.

12222221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222222128.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12222221210 its reverse (1212222221), we get a palindrome (13434443431).

The spelling of 12222221210 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred ten".