12213909528 has 32 divisors (see below), whose sum is σ = 30575477760. Its totient is φ = 4065876000.

The previous prime is 12213909527. The next prime is 12213909529. The reversal of 12213909528 is 82590931221.

It is an interprime number because it is at equal distance from previous prime (12213909527) and next prime (12213909529).

It is a self number, because there is not a number n which added to its sum of digits gives 12213909528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213909523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320800 + ... + 356847.

It is an arithmetic number, because the mean of its divisors is an integer number (955483680).

Almost surely, 2^12213909528 is an apocalyptic number.

It is an amenable number.

12213909528 is an abundant number, since it is smaller than the sum of its proper divisors (18361568232).

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

12213909528 is a wasteful number, since it uses less digits than its factorization.

12213909528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678407 (or 678403 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 12213909528 in words is "twelve billion, two hundred thirteen million, nine hundred nine thousand, five hundred twenty-eight".