6311016221 has 12 divisors (see below), whose sum is σ = 6625742292. Its totient is φ = 6009865344.

The previous prime is 6311016211. The next prime is 6311016223. The reversal of 6311016221 is 1226101136.

It can be written as a sum of positive squares in 6 ways, for example, as 125193721 + 6185822500 = 11189^2 + 78650^2 .

It is not a de Polignac number, because 6311016221 - 2¹⁰ = 6311015197 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 (6311016223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9995 + ... + 112791.

It is an arithmetic number, because the mean of its divisors is an integer number (552145191).

Almost surely, 2^6311016221 is an apocalyptic number.

It is an amenable number.

6311016221 is a deficient number, since it is larger than the sum of its proper divisors (314726071).

6311016221 is a wasteful number, since it uses less digits than its factorization.

6311016221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102928 (or 102899 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 6311016221 is about 79441.9046914159. The cubic root of 6311016221 is about 1847.9906326438.

Adding to 6311016221 its reverse (1226101136), we get a palindrome (7537117357).

The spelling of 6311016221 in words is "six billion, three hundred eleven million, sixteen thousand, two hundred twenty-one".