7121331217 has 48 divisors (see below), whose sum is σ = 9709451136. Its totient is φ = 5082105600.

The previous prime is 7121331209. The next prime is 7121331227.

7121331217 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7121331217 - 2³ = 7121331209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7121331227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1439973 + ... + 1444909.

It is an arithmetic number, because the mean of its divisors is an integer number (202280232).

Almost surely, 2^7121331217 is an apocalyptic number.

7121331217 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

7121331217 is a deficient number, since it is larger than the sum of its proper divisors (2588119919).

7121331217 is a wasteful number, since it uses less digits than its factorization.

7121331217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110 (or 5099 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 7121331217 is about 84387.9802874793. The cubic root of 7121331217 is about 1923.9202325473.

The spelling of 7121331217 in words is "seven billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred seventeen".