12221210 has 16 divisors (see below), whose sum is σ = 22173696. Its totient is φ = 4849488.

The previous prime is 12221207. The next prime is 12221233. The reversal of 12221210 is 1212221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12221191 and 12221200.

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, 3542 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (1385856).

Almost surely, 2^12221210 is an apocalyptic number.

12221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221210 is a deficient number, since it is larger than the sum of its proper divisors (9952486).

12221210 is a wasteful number, since it uses less digits than its factorization.

12221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12221210 is about 3495.8847234999. The cubic root of 12221210 is about 230.3410818394.

Adding to 12221210 its reverse (1212221), we get a palindrome (13433431).

The spelling of 12221210 in words is "twelve million, two hundred twenty-one thousand, two hundred ten".