12011219897 has 2 divisors, whose sum is σ = 12011219898. Its totient is φ = 12011219896.

The previous prime is 12011219887. The next prime is 12011219929. The reversal of 12011219897 is 79891211021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7258358416 + 4752861481 = 85196^2 + 68941^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011219897 - 2⁸ = 12011219641 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011219807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005609948 + 6005609949.

It is an arithmetic number, because the mean of its divisors is an integer number (6005609949).

Almost surely, 2^12011219897 is an apocalyptic number.

It is an amenable number.

12011219897 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011219897 is an equidigital number, since it uses as much as digits as its factorization.

12011219897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 41.

The spelling of 12011219897 in words is "twelve billion, eleven million, two hundred nineteen thousand, eight hundred ninety-seven".