7106820121 has 4 divisors (see below), whose sum is σ = 7137854500. Its totient is φ = 7075785744.

The previous prime is 7106820109. The next prime is 7106820143. The reversal of 7106820121 is 1210286017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4233324096 + 2873496025 = 65064^2 + 53605^2 .

It is a cyclic number.

It is not a de Polignac number, because 7106820121 - 2¹¹ = 7106818073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7106820121.

It is not an unprimeable number, because it can be changed into a prime (7106820151) 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 3 ways as a sum of consecutive naturals, for example, 15516846 + ... + 15517303.

It is an arithmetic number, because the mean of its divisors is an integer number (1784463625).

Almost surely, 2^7106820121 is an apocalyptic number.

It is an amenable number.

7106820121 is a deficient number, since it is larger than the sum of its proper divisors (31034379).

7106820121 is a wasteful number, since it uses less digits than its factorization.

7106820121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31034378.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 7106820121 is about 84301.9579903100. The cubic root of 7106820121 is about 1922.6125568357.

The spelling of 7106820121 in words is "seven billion, one hundred six million, eight hundred twenty thousand, one hundred twenty-one".