110111022220021 has 2 divisors, whose sum is σ = 110111022220022. Its totient is φ = 110111022220020.

The previous prime is 110111022219997. The next prime is 110111022220037. The reversal of 110111022220021 is 120022220111011.

It is an a-pointer prime, because the next prime (110111022220037) can be obtained adding 110111022220021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78592746215025 + 31518276004996 = 8865255^2 + 5614114^2 .

It is an emirp because it is prime and its reverse (120022220111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110111022220021 - 2³³ = 110102432285429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110111022219977 and 110111022220004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110111022220051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55055511110010 + 55055511110011.

It is an arithmetic number, because the mean of its divisors is an integer number (55055511110011).

Almost surely, 2^{110111022220021} is an apocalyptic number.

It is an amenable number.

110111022220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110111022220021 is an equidigital number, since it uses as much as digits as its factorization.

110111022220021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 110111022220021 its reverse (120022220111011), we get a palindrome (230133242331032).

The spelling of 110111022220021 in words is "one hundred ten trillion, one hundred eleven billion, twenty-two million, two hundred twenty thousand, twenty-one".