12221525438 has 8 divisors (see below), whose sum is σ = 18427274688. Its totient is φ = 6079100544.

The previous prime is 12221525423. The next prime is 12221525453. The reversal of 12221525438 is 83452512221.

It is an interprime number because it is at equal distance from previous prime (12221525423) and next prime (12221525453).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12221525398 and 12221525407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15830606 + ... + 15831377.

It is an arithmetic number, because the mean of its divisors is an integer number (2303409336).

Almost surely, 2^12221525438 is an apocalyptic number.

12221525438 is a deficient number, since it is larger than the sum of its proper divisors (6205749250).

12221525438 is a wasteful number, since it uses less digits than its factorization.

12221525438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31662178.

The product of its digits is 38400, while the sum is 35.

The spelling of 12221525438 in words is "twelve billion, two hundred twenty-one million, five hundred twenty-five thousand, four hundred thirty-eight".