12211570 has 32 divisors (see below), whose sum is σ = 25711488. Its totient is φ = 4088448.

The previous prime is 12211561. The next prime is 12211579. The reversal of 12211570 is 7511221.

It is an interprime number because it is at equal distance from previous prime (12211561) and next prime (12211579).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12211579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982 + ... + 5038.

It is an arithmetic number, because the mean of its divisors is an integer number (803484).

Almost surely, 2^12211570 is an apocalyptic number.

12211570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211570 is an abundant number, since it is smaller than the sum of its proper divisors (13499918).

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

12211570 is a wasteful number, since it uses less digits than its factorization.

12211570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 12211570 is about 3494.5056875043. The cubic root of 12211570 is about 230.2805021281.

Adding to 12211570 its reverse (7511221), we get a palindrome (19722791).

The spelling of 12211570 in words is "twelve million, two hundred eleven thousand, five hundred seventy".