110111312021 has 2 divisors, whose sum is σ = 110111312022. Its totient is φ = 110111312020.

The previous prime is 110111311991. The next prime is 110111312033. The reversal of 110111312021 is 120213111011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77679264100 + 32432047921 = 278710^2 + 180089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110111312021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110111311987 and 110111312005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110111312071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55055656010 + 55055656011.

It is an arithmetic number, because the mean of its divisors is an integer number (55055656011).

Almost surely, 2^110111312021 is an apocalyptic number.

It is an amenable number.

110111312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110111312021 is an equidigital number, since it uses as much as digits as its factorization.

110111312021 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 14.

Adding to 110111312021 its reverse (120213111011), we get a palindrome (230324423032).

The spelling of 110111312021 in words is "one hundred ten billion, one hundred eleven million, three hundred twelve thousand, twenty-one".