311102221061 has 2 divisors, whose sum is σ = 311102221062. Its totient is φ = 311102221060.

The previous prime is 311102221057. The next prime is 311102221093. The reversal of 311102221061 is 160122201113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259074892036 + 52027329025 = 508994^2 + 228095^2 .

It is a cyclic number.

It is not a de Polignac number, because 311102221061 - 2² = 311102221057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311102521061) 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 as a sum of consecutive naturals, namely, 155551110530 + 155551110531.

It is an arithmetic number, because the mean of its divisors is an integer number (155551110531).

Almost surely, 2^311102221061 is an apocalyptic number.

It is an amenable number.

311102221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

311102221061 is an equidigital number, since it uses as much as digits as its factorization.

311102221061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 311102221061 its reverse (160122201113), we get a palindrome (471224422174).

The spelling of 311102221061 in words is "three hundred eleven billion, one hundred two million, two hundred twenty-one thousand, sixty-one".