12221700 has 36 divisors (see below), whose sum is σ = 35362320. Its totient is φ = 3259040.

The previous prime is 12221689. The next prime is 12221749. The reversal of 12221700 is 712221.

12221700 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12221700.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20070 + ... + 20669.

Almost surely, 2^12221700 is an apocalyptic number.

12221700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221700 is an abundant number, since it is smaller than the sum of its proper divisors (23140620).

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

12221700 is a wasteful number, since it uses less digits than its factorization.

12221700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40756 (or 40749 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 12221700 is about 3495.9548051999. The cubic root of 12221700 is about 230.3441602477.

Adding to 12221700 its reverse (712221), we get a palindrome (12933921).

It can be divided in two parts, 12221 and 700, that added together give a palindrome (12921).

The spelling of 12221700 in words is "twelve million, two hundred twenty-one thousand, seven hundred".