311440221011 has 2 divisors, whose sum is σ = 311440221012. Its totient is φ = 311440221010.

The previous prime is 311440220957. The next prime is 311440221031. The reversal of 311440221011 is 110122044113.

It is an a-pointer prime, because the next prime (311440221031) can be obtained adding 311440221011 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311440221011 - 2⁶ = 311440220947 is a prime.

It is a super-2 number, since 2×311440221011² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311440221031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155720110505 + 155720110506.

It is an arithmetic number, because the mean of its divisors is an integer number (155720110506).

Almost surely, 2^311440221011 is an apocalyptic number.

311440221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

311440221011 is an equidigital number, since it uses as much as digits as its factorization.

311440221011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 311440221011 its reverse (110122044113), we get a palindrome (421562265124).

The spelling of 311440221011 in words is "three hundred eleven billion, four hundred forty million, two hundred twenty-one thousand, eleven".