12247198521 has 8 divisors (see below), whose sum is σ = 16348094880. Its totient is φ = 8155550592.

The previous prime is 12247198507. The next prime is 12247198529. The reversal of 12247198521 is 12589174221.

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

It is not a de Polignac number, because 12247198521 - 2¹¹ = 12247196473 is a prime.

It is a super-2 number, since 2×12247198521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12247198529) 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, 2309016 + ... + 2314313.

It is an arithmetic number, because the mean of its divisors is an integer number (2043511860).

Almost surely, 2^12247198521 is an apocalyptic number.

It is an amenable number.

12247198521 is a deficient number, since it is larger than the sum of its proper divisors (4100896359).

12247198521 is an equidigital number, since it uses as much as digits as its factorization.

12247198521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624215.

The product of its digits is 80640, while the sum is 42.

The spelling of 12247198521 in words is "twelve billion, two hundred forty-seven million, one hundred ninety-eight thousand, five hundred twenty-one".