12198958061 has 2 divisors, whose sum is σ = 12198958062. Its totient is φ = 12198958060.

The previous prime is 12198958043. The next prime is 12198958069. The reversal of 12198958061 is 16085989121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10714320100 + 1484637961 = 103510^2 + 38531^2 .

It is an emirp because it is prime and its reverse (16085989121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12198958061 - 2⁶ = 12198957997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12198958069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6099479030 + 6099479031.

It is an arithmetic number, because the mean of its divisors is an integer number (6099479031).

Almost surely, 2^12198958061 is an apocalyptic number.

It is an amenable number.

12198958061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12198958061 is an equidigital number, since it uses as much as digits as its factorization.

12198958061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 50.

The spelling of 12198958061 in words is "twelve billion, one hundred ninety-eight million, nine hundred fifty-eight thousand, sixty-one".