311010201221 has 8 divisors (see below), whose sum is σ = 327769377600. Its totient is φ = 294290046720.

The previous prime is 311010201193. The next prime is 311010201233. The reversal of 311010201221 is 122102010113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311010201221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311010201196 and 311010201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311010201421) 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, 9739100 + ... + 9770981.

It is an arithmetic number, because the mean of its divisors is an integer number (40971172200).

Almost surely, 2^311010201221 is an apocalyptic number.

It is an amenable number.

311010201221 is a deficient number, since it is larger than the sum of its proper divisors (16759176379).

311010201221 is a wasteful number, since it uses less digits than its factorization.

311010201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19510939.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 311010201221 its reverse (122102010113), we get a palindrome (433112211334).

The spelling of 311010201221 in words is "three hundred eleven billion, ten million, two hundred one thousand, two hundred twenty-one".