7121196811 has 8 divisors (see below), whose sum is σ = 7183554048. Its totient is φ = 7058961000.

The previous prime is 7121196781. The next prime is 7121196821. The reversal of 7121196811 is 1186911217.

It is a happy number.

7121196811 is a nontrivial binomial coefficient, being equal to C(119342, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(7121196811) divides (7121196811-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 7121196811 - 2²³ = 7112808203 is a prime.

It is a super-2 number, since 2×7121196811² (a number of 21 digits) contains 22 as substring.

It is a deceptive number, since it divides R_7121196810.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121196821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89506 + ... + 149176.

It is an arithmetic number, because the mean of its divisors is an integer number (897944256).

It is a Poulet number, since it divides 2^7121196810-1.

Almost surely, 2^7121196811 is an apocalyptic number.

7121196811 is the 119341-st triangular number and also the 59671-st hexagonal number.

7121196811 is the 39781-st centered nonagonal number.

7121196811 is a deficient number, since it is larger than the sum of its proper divisors (62357237).

7121196811 is a wasteful number, since it uses less digits than its factorization.

7121196811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60713.

The product of its digits is 6048, while the sum is 37.

The square root of 7121196811 is about 84387.1839262337. The cubic root of 7121196811 is about 1923.9081286283.

The spelling of 7121196811 in words is "seven billion, one hundred twenty-one million, one hundred ninety-six thousand, eight hundred eleven".