12121111020071 has 2 divisors, whose sum is σ = 12121111020072. Its totient is φ = 12121111020070.

The previous prime is 12121111020043. The next prime is 12121111020091. The reversal of 12121111020071 is 17002011112121.

It is a happy number.

It is an a-pointer prime, because the next prime (12121111020091) can be obtained adding 12121111020071 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121111020071 - 2¹⁸ = 12121110757927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121111020091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060555510035 + 6060555510036.

It is an arithmetic number, because the mean of its divisors is an integer number (6060555510036).

Almost surely, 2^{12121111020071} is an apocalyptic number.

12121111020071 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121111020071 is an equidigital number, since it uses as much as digits as its factorization.

12121111020071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 12121111020071 its reverse (17002011112121), we get a palindrome (29123122132192).

The spelling of 12121111020071 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twenty thousand, seventy-one".