7111212121117 has 16 divisors (see below), whose sum is σ = 7955178018480. Its totient is φ = 6311546035200.

The previous prime is 7111212121099. The next prime is 7111212121127.

7111212121117 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 227992880196 + 6883219240921 = 477486^2 + 2623589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7111212121117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7111212121127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39043234 + ... + 39224947.

It is an arithmetic number, because the mean of its divisors is an integer number (497198626155).

Almost surely, 2^{7111212121117} is an apocalyptic number.

It is an amenable number.

7111212121117 is a deficient number, since it is larger than the sum of its proper divisors (843965897363).

7111212121117 is a wasteful number, since it uses less digits than its factorization.

7111212121117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78268464.

The product of its digits is 392, while the sum is 28.

The spelling of 7111212121117 in words is "seven trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred seventeen".