12221052 has 12 divisors (see below), whose sum is σ = 28515816. Its totient is φ = 4073680.

The previous prime is 12221039. The next prime is 12221057. The reversal of 12221052 is 25012221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12221052² = 298708223973408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509199 + ... + 509222.

It is an arithmetic number, because the mean of its divisors is an integer number (2376318).

Almost surely, 2^12221052 is an apocalyptic number.

12221052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221052 is an abundant number, since it is smaller than the sum of its proper divisors (16294764).

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

12221052 is a wasteful number, since it uses less digits than its factorization.

12221052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018428 (or 1018426 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12221052 is about 3495.8621254277. The cubic root of 12221052 is about 230.3400891923.

Adding to 12221052 its reverse (25012221), we get a palindrome (37233273).

The spelling of 12221052 in words is "twelve million, two hundred twenty-one thousand, fifty-two".