12121111012247 has 2 divisors, whose sum is σ = 12121111012248. Its totient is φ = 12121111012246.

The previous prime is 12121111012177. The next prime is 12121111012259. The reversal of 12121111012247 is 74221011112121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121111012247 - 2¹⁴ = 12121110995863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121111012847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060555506123 + 6060555506124.

It is an arithmetic number, because the mean of its divisors is an integer number (6060555506124).

Almost surely, 2^{12121111012247} is an apocalyptic number.

12121111012247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121111012247 is an equidigital number, since it uses as much as digits as its factorization.

12121111012247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 26.

Adding to 12121111012247 its reverse (74221011112121), we get a palindrome (86342122124368).

The spelling of 12121111012247 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twelve thousand, two hundred forty-seven".