1211100738779 has 2 divisors, whose sum is σ = 1211100738780. Its totient is φ = 1211100738778.

The previous prime is 1211100738773. The next prime is 1211100738781. The reversal of 1211100738779 is 9778370011121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211100738779 is a prime.

Together with 1211100738781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1211100738773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605550369389 + 605550369390.

It is an arithmetic number, because the mean of its divisors is an integer number (605550369390).

Almost surely, 2^{1211100738779} is an apocalyptic number.

1211100738779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211100738779 is an equidigital number, since it uses as much as digits as its factorization.

1211100738779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 47.

The spelling of 1211100738779 in words is "one trillion, two hundred eleven billion, one hundred million, seven hundred thirty-eight thousand, seven hundred seventy-nine".