7721331011 has 8 divisors (see below), whose sum is σ = 7837736544. Its totient is φ = 7605138240.

The previous prime is 7721330971. The next prime is 7721331029. The reversal of 7721331011 is 1101331277.

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

It is a cyclic number.

It is not a de Polignac number, because 7721331011 - 2³⁰ = 6647589187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7721331061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20705 + ... + 125981.

It is an arithmetic number, because the mean of its divisors is an integer number (979717068).

Almost surely, 2^7721331011 is an apocalyptic number.

7721331011 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

7721331011 is a deficient number, since it is larger than the sum of its proper divisors (116405533).

7721331011 is a wasteful number, since it uses less digits than its factorization.

7721331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106381.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 7721331011 is about 87871.1045281667. The cubic root of 7721331011 is about 1976.5026015126.

Adding to 7721331011 its reverse (1101331277), we get a palindrome (8822662288).

The spelling of 7721331011 in words is "seven billion, seven hundred twenty-one million, three hundred thirty-one thousand, eleven".