12198138841 has 20 divisors (see below), whose sum is σ = 14243286672. Its totient is φ = 10446021096.

The previous prime is 12198138811. The next prime is 12198138847. The reversal of 12198138841 is 14883189121.

It is not a de Polignac number, because 12198138841 - 2⁷ = 12198138713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12198138791 and 12198138800.

It is not an unprimeable number, because it can be changed into a prime (12198138847) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4289166 + ... + 4292008.

Almost surely, 2^12198138841 is an apocalyptic number.

It is an amenable number.

12198138841 is a deficient number, since it is larger than the sum of its proper divisors (2045147831).

12198138841 is an frugal number, since it uses more digits than its factorization.

12198138841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658 (or 4637 counting only the distinct ones).

The product of its digits is 110592, while the sum is 46.

The spelling of 12198138841 in words is "twelve billion, one hundred ninety-eight million, one hundred thirty-eight thousand, eight hundred forty-one".