311121021110111 has 2 divisors, whose sum is σ = 311121021110112. Its totient is φ = 311121021110110.

The previous prime is 311121021110101. The next prime is 311121021110197. The reversal of 311121021110111 is 111011120121113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311121021110111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311121021110111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311121021110101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155560510555055 + 155560510555056.

It is an arithmetic number, because the mean of its divisors is an integer number (155560510555056).

Almost surely, 2^{311121021110111} is an apocalyptic number.

311121021110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

311121021110111 is an equidigital number, since it uses as much as digits as its factorization.

311121021110111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 17.

Adding to 311121021110111 its reverse (111011120121113), we get a palindrome (422132141231224).

The spelling of 311121021110111 in words is "three hundred eleven trillion, one hundred twenty-one billion, twenty-one million, one hundred ten thousand, one hundred eleven".