1211111122079 has 2 divisors, whose sum is σ = 1211111122080. Its totient is φ = 1211111122078.

The previous prime is 1211111122049. The next prime is 1211111122171. The reversal of 1211111122079 is 9702211111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211111122079 - 2¹⁶ = 1211111056543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211111122049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555561039 + 605555561040.

It is an arithmetic number, because the mean of its divisors is an integer number (605555561040).

Almost surely, 2^{1211111122079} is an apocalyptic number.

1211111122079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211111122079 is an equidigital number, since it uses as much as digits as its factorization.

1211111122079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 29.

The spelling of 1211111122079 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, seventy-nine".